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C语言期末作业(15个)-货物管理系统、歌曲信息管理系统、职工信息管理系统源码、学生打卡系统、小学生计算机辅助教学系统、门禁系统、银行管理系统等等

C语言期末作业15个(上)

9、C语言货物管理系统

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>        /*屏幕操作函数库*/
/*主管权限数据格式化*/
#define HEADER1_zg "-----------------------------货物管理系统(主管)--------------------------------\n"
#define HEADER2_zg "| 编号 |  名称  | 进价 | 售价 | 产地 | 生产日期 |保质期| 库存 | 销量 |  收入  |\n"
#define HEADER3_zg "|------|--------|------|------|------|----------|------|------|------|--------|\n"
#define FORMAT_zg  "|%-6s|%-8s|%.2f |%.2f |%6s|%-4d%3d%3d| %4d | %4d | %4d |%.2f |\n"
#define DATA_zg p->data.numbs,p->data.name,p->data.purchase,p->data.sales,p->data.place,p->data.Date.year,p->data.Date.mouth,p->data.Date.day,p->data.days,p->data.stock,p->data.salesnumb,p->data.income
#define END_zg     "-------------------------------------------------------------------------------\n"
/*普通权限数据格式化*/
#define HEADER1_pt "----------------货物管理系统(普通)--------------------\n"
#define HEADER2_pt "| 编号 |  名称  | 售价 | 产地 | 生产日期 |保质期| 销量 |\n"
#define HEADER3_pt "|------|--------|------|------|----------|------|------|\n"
#define FORMAT_pt  "|%-6s|%-8s| %.2f|%6s|%-4d%3d%3d| %4d | %4d |\n"
#define DATA_pt p->data.numbs,p->data.name,p->data.sales,p->data.place,p->data.Date.year,p->data.Date.mouth,p->data.Date.day,p->data.days,p->data.salesnumb
#define END_pt    "--------------------------------------------------------\n"
int yhflag=0;        /*是否优惠*/
int incomflag=0;   /*是否计算收入*/
int dateflag=0;   /*是否输入日期*/
int saveflag=0;   /*是否需要保存*/
char zg[]="zg";
char pt[]="pt";
struct date
{
    int year;
    int mouth;
    int day;
};
/*货物基本信息*/
struct goods
{
    char numbs[6];    /*编号*/
    char name[10];        /*名称*/
    float purchase;        /*进价*/
    float sales;    /*售价*/
    char place[10];    /*产地*/
    struct date Date;    /*生产日期*/
    int days;  /*保质期*/
    int datecha; /*保质期截止日期差*/
    int stock;    /*库存量*/
    int  salesnumb;    /*销量*/
    float income;    /*收入*/
};
typedef struct node
{
    struct goods data;
    struct node *next;
}Node,*Link;
/*格式化输出主管表头*/
void printheader_zg()
{
    printf(HEADER1_zg);
    printf(HEADER2_zg);
    printf(HEADER3_zg);
}
/*格式化输出普通表头*/
void printheader_pt()
{
    printf(HEADER1_pt);
    printf(HEADER2_pt);
    printf(HEADER3_pt);
}
/*格式化输出主管表中数据*/
void printdata_zg(Node *pp)
{
    Node *p;
    p=pp;
    printf(FORMAT_zg,DATA_zg);
}
/*格式化输出普通表中数据*/
void printdata_pt(Node *pp)
{
    Node *p;
    p=pp;
    printf(FORMAT_pt,DATA_pt);
}
/*输出案件错误信息*/
void wrong()
{
    printf("\n\n\n\n*******错误:输入错误,按任意键继续*******\n");
    getchar();
}
/*输出为查找到货物的信息*/
void Nofind()
{
    printf("\n*****无此货物信息!*****\n");
    getchar();
}
/*主管显示菜单*/
void Disp(Link L,char s[])
{
    Node *p;
    p=L->next;
    if (!p) /*空,则*/
    {
        printf("\n没有录入货物信息\n");
        getchar();
        return ;
    }    
    printf("\n\n");
    if (strcmp(zg,s)==0)
    {
        printheader_zg();
        while (p)
        {
            printdata_zg(p);
            p=p->next;
            printf(HEADER3_zg);
        }
    } 
    else
    {
        printheader_pt();
        while (p)
        {
            printdata_pt(p);
            p=p->next;
            printf(HEADER3_pt);
        }
    }
    getchar();
}
/*返回链表中符合要求的节点的指针,s[]保存用户查找内容,NaorNum[]保存按什么查找”name,num“*/
Node *Locate(Link L,char s[],char NaorNum[] )
{
    Node *p;
    if (strcmp(NaorNum,"num")==0)
    {
        p=L->next;
        while (p)
        {
            if (strcmp(p->data.numbs,s)==0)
                return p;
            p=p->next;
        }
    } 
    else if (strcmp(NaorNum,"name")==0)
    {
        p=L->next;
        while (p)
        {
            if (strcmp(p->data.name,s)==0)
                return p;
            p=p->next;
        }
    }
    return 0;     /*未找到,返回空指针*/
}
/*平润年判断*/
int Year_pd(int year)
{
    int flag;
    if ((year%4==0&&year%100!=0)||year%400==0)
    {/*闰年*/
        flag=0;
    } 
    else
    {/*平年*/
        flag=1;
    }
    return flag;
}
/*月份对应的天数*/
int Day_pd(int mouth,int flag)
{
    int day;
    switch(mouth)
    {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:day=31;break;
    case 4:
    case 6:
    case 9:
    case 11:day=30;break;
    case 2:if (flag) day=28;
           else day=29;break;
    }
    return day;
}
/*输入字符串,并进行验证,用户的输入通过*t输出*/
void S_input(char *t,int lens,char *notice)
{
    char str[255];
    do 
    {
        printf(notice);
        scanf("%s",str);
        if(strlen(str)>lens)
            printf("\n超过了要求长度,重新输入\n");
    } while (strlen(str)>lens);
    strcpy(t,str);
}
int Num_input(char *notice)
{
    int a;
    do 
    {
        printf(notice);
        scanf("%d",&a);
        if(a<0) printf("\n数字必须大于零\n");
    } while (a<0);
    return a;
}
/*输入月份进行验证*/
int Mou_input(char *notice)
{
    int mouth=0;
    do 
    {
        printf(notice);
        scanf("%d",&mouth);
        if (mouth>12||mouth<0) 
            printf("\n月份必须在(1~12)之间!\n");
    } while (mouth>12||mouth<0);
    return mouth;
}
/*输入天数进行验证*/
int Day_input(char *notice,int year,int mouth)
{
    int day=0;
    int nlimit,flag;
    flag=Year_pd(year);
    do 
    {
        printf(notice);
        scanf("%d",&day);
        nlimit=Day_pd(mouth,flag);
        if (day>nlimit||day<0) 
            printf("\n日期必须在(1~%d)之间!\n",nlimit);
    } while (day>nlimit||mouth<0);
    return day;
}
/*增加货物记录*/
void Add_goods(Link L)
{
    Node *p,*r,*s;
    char ch,flag=0,num[10];
    r=L;
    s=L->next;
    system("cls");
    Disp(L,zg);
    while (1)
    {
        while (1) /*输入编号,保证没有被使用,若输入为0,则推出*/
        {
            S_input(num,6,"输入货物编号(按‘0'返回菜单界面):");
            flag=0;
            if (strcmp(num,"0")==0) return;
            s=L->next;
            while (s) /*查询货物编号是否存在,若存在,要去输入新编号*/
            {
                if (strcmp(s->data.numbs,num)==0)
                {
                    flag=1;
                    break;
                }
                s=s->next;
            }
            if (flag)
            {
                getchar();
                printf("货物编号:%s已存在,是否要重新输入?(y/n)",num);
                scanf("%c",&ch);
                if(ch=='y'||ch=='Y')
                    continue;
                else
                    return;
            }
            else
                break;
        }
        p=(Node *)malloc(sizeof(Node));
        if (!p)
        {
            printf("\n没有申请到");
            return; /*返回到主界面*/
        }
        strcpy(p->data.numbs,num);
        S_input(p->data.name,8,"名称:");
        p->data.purchase=Num_input("进价:");
        p->data.sales=Num_input("售价:");
        S_input(p->data.place,6,"产地:");
        p->data.Date.year=Num_input("成产日期:年:");
        p->data.Date.mouth=Mou_input("         月:");
        p->data.Date.day=Day_input("         日:",p->data.Date.year,p->data.Date.mouth);
        p->data.days=Num_input("保质期(天):");
        p->data.stock=Num_input("库存:");
        p->data.salesnumb=Num_input("销量:");
        p->data.income=00;
        p->next=r->next;
        r->next=p; /*前插*/
    }
    return ;
}
int select(int a,int b)               /*菜单选择*/
{
    int n;
    do 
    {
        printf("\n\n");
        printf("%15s"," ");
        printf("请输入一个数(%d~%d): [ ]\b\b",a,b);
        scanf("%d",&n);
    } while (n<a||n>b);
    return n;
}
/*实时计算实际收益*/
void Sum_Income(Link L)
{
    Node *p;
    p=L->next;
    while (p)
    {
        p->data.income=p->data.salesnumb*(p->data.sales-p->data.purchase);
        p=p->next;
    }
    incomflag=1;
    return ;
}
/*查询的通用方法*/
void Sea_by_ways(Link L,Node *p,char s[])
{
    if (p)
    {
        if (strcmp(zg,s)==0)
        {
            printheader_zg();
            printdata_zg(p);
            printf(END_zg);
            printf("按任意键返回...");
            getchar();
        }
        else
        {
            printheader_pt();
            printdata_pt(p);
            printf(END_pt);
            printf("按任意键返回...");
            getchar();
        }
    } 
    else
    {
        Nofind();
        getchar();
    }    
}
/*按编号或货物名称查询*/
void Sea_by_name(Link L,char s[])
{
    Node *p;
    char ss[20];
    system("cls");
    S_input(ss,10,"请输入要查找的货物名称:");
    p=Locate(L,ss,"name");
    Sea_by_ways(L,p,s);
}
void Sea_by_num(Link L,char s[])
{
    Node *p;
    char ss[20];
    system("cls");
    S_input(ss,10,"请输入要查找的货物编号:");
    p=Locate(L,ss,"num");
    Sea_by_ways(L,p,s);
}
/*日期相对于本年的天数*/
int Sum_day(int year,int mouth,int day)
{
    int i,flag,days,sum=0;
    flag=Year_pd(year);
    for (i=1;i<mouth;i++)
    {
        days=Day_pd(i,flag);
        sum+=days;
    }
    return sum+day;
}
/*两个日期差值*/ 
void Datecha(Link L)
{
    int year,mouth,day;
    Node *p;
    p=L->next;
    year=Num_input("今天日期:年:");
    mouth=Mou_input("月:");
    day=Day_input("日:",year,mouth);
    dateflag=1;
    if (!p)
    {
        printf("***无货物信息,不用输入日期***\n");
        getchar();
        return ;
    } 
    else
    {
        while (p)
        {
            p->data.datecha=Sum_day(year,mouth,day)-Sum_day(p->data.Date.year,p->data.Date.mouth,p->data.Date.day);
            p=p->next;
        }
    }
}
void Dz_by_data( Link L)
{
    Node *p,*r;
    Link l;
    int year,mouth,day,count=0;
    p=L->next;
    l=(Node *)malloc(sizeof(Node));
    l->next=NULL;
    system("cls");
    if (!dateflag)
    {
        Datecha(L);
    }
    printf("| 编号 |  名称  |过期差值|\n");
    while (p)
    {
        printf("|%-6s|%-8s|  %4d  |",p->data.numbs,p->data.name,p->data.datecha);
        if (p->data.days>=p->data.datecha)
        {
            /*优惠的标示优惠*/
            if (p->data.days-p->data.datecha<=10)
            {
                count++;
                p->data.sales=p->data.sales/2;
                printf("已优惠\n");
                /*        Ltol(l,p,p->next);*/
            }
            else
            {
                printf("\n");
            }
        }
        else 
        {
            printf("该商品过期,请删除\n");
        }
        p=p->next;
    }
    if(!count)
    {
        printf("/n***没有差10天过期的货物***/n");
        getchar();
        return;
    }
    else
    {
        printf("共有%d中商品打折",count);
        yhflag=1;
        saveflag=1;
        Disp(L,zg);
    }
}
/*删除*/
void Del_by_ways(Link L,Node *p)
{
    Node *q;
    char ch;
    if (p)
    {
        q=L;
        while(q->next!=p)
            q=q->next;
        printheader_zg();
        printdata_zg(p);
        printf(END_zg);
        getchar();
        printf("请确定是否要删除该货物信息(y/n):");
        scanf("%c",&ch);
        if (ch=='y'||ch=='Y')
        {
            q->next=p->next;
            free(p);
            printf("\n成功删除该货物信息\n");
            saveflag=1;
            getchar();
            return;
        }
        else
        {
            printf("\n没有删除该货物信息\n");
            getchar();
            return;
        }
    } 
    else
    {
        Nofind();
        getchar();
    }    
}
/*通过名称删除*/
void Del_by_name(Link L)
{
    Node *p;
    char s[20];
    system("cls");
    S_input(s,10,"请输入要查删除的货物名称:");
    p=Locate(L,s,"name");
    Del_by_ways(L,p);
}
/*通过编号删除*/
void Del_by_num(Link L)
{
    Node *p;
    char s[20];
    system("cls");
    S_input(s,10,"请输入要查删除的货物的编号:");
    p=Locate(L,s,"num");
    Del_by_ways(L,p);
}

/*补货信息*/
void Buhuo(Link L)
{
    Node *p,*q;
    int i=0;
    p=L->next;
    system("cls");
    if (p)
    {
        q=L->next;
        printf("|  编号  |  名称  |库存|销量|剩余| \n");
        while (q)
        {
            /*统计库存,销量,剩余*/
            printf("|%-8s|%-8s|%-4d|%4d|%4d|\n",q->data.numbs,q->data.name,q->data.stock,q->data.salesnumb,q->data.stock-q->data.salesnumb);
            q=q->next;
        }
        while (p)
        {
            if ((p->data.stock-p->data.salesnumb)<100)
            {
                if (i==0)
                {
                    printf("需要补货的货物分别是\n");
                    printf("|  编号  |商品名称|\n");
                }
                printf("|%-8s|%8s|\n",p->data.numbs,p->data.name);
                i++;
            }
            p=p->next;
        }
        if (i)
        {
            printf("共%d种货物\n",i);
            getchar();
            return;
        } 
        else
        {
            printf("没有需要补充的货物种类\n");
            getchar();
            return;
        }
    } 
    else
    {
        printf("\n***没有货物信息***\n");
        printf("\n按任意键返回...\n");
        getchar();
        return ;
    }
}
void Sort_by_ways(Link L,char s[],int n)
{
    int flag=0,a;
    Node *p,*q,*lq,*fq;   /*fq记下节点前驱,lq记下节点的后驱,q每次冒泡遍历,p控制遍历,qq用来交换地址*/
    p=L->next;
    system("cls");
    while (p)
    {
        fq=L;
        q=fq->next;
        while (lq=q->next)
        {
            if (strcmp(zg,s)==0)
            {
                switch (n)
                {
                case 1:a=strcmp(q->data.name,lq->data.name);break;
                case 2:a=strcmp(q->data.numbs,lq->data.numbs);break;
                case 3:a=(q->data.salesnumb>lq->data.salesnumb);break;
                case 4:if(!incomflag) Sum_Income(L); a=(q->data.income>lq->data.income);break;
                case 5:if (!dateflag) Datecha(L);a=(q->data.datecha>lq->data.datecha);break;
                }
            } 
            else
            {
                switch (n)
                {
                case 1:a=strcmp(q->data.name,lq->data.name);break;
                case 2:a=strcmp(q->data.numbs,lq->data.numbs);break;
                case 3:a=(q->data.sales>lq->data.sales);break;
                case 4:a=(q->data.salesnumb>lq->data.salesnumb);break;
                case 5:if (!dateflag) Datecha(L);a=(q->data.datecha>lq->data.datecha);break;
                }
            }

            /*if ((n==1)?(strcmp(q->data.name,lq->data.name)):(strcmp(q->data.numbs,q->data.numbs)))*/
            if(a>0)
            {
                flag=1;
                q->next=lq->next;
                lq->next=q;
                fq->next=lq;
            }
            fq=fq->next;
            q=fq->next;
        }
        if(flag==0) break;
        p=p->next;
    }
    if (strcmp(zg,s)==0)
        Disp(L,zg);
    else
        Disp(L,pt);
}
void Wb_Save(Link L)
{
    FILE *out;
    Node *p;
    int count=0;
    if ((out=fopen("d:\\Goods.txt","w"))==NULL)
    {
        printf("打开文件失败!\n");
        getchar();
        return;
    }
    p=L->next;
    fprintf(out,HEADER1_zg);
    fprintf(out,HEADER2_zg);
    fprintf(out,HEADER3_zg);
    while (p)
    {
        fprintf(out,FORMAT_zg,DATA_zg);
        p=p->next;
        fprintf(out,HEADER3_zg);
        count++;
    }
    if (count>0)
    {
        getchar();
        printf("\n\n\n***文本文件保存完成,共%d条货物信息保存***\n",count);
        getchar();
        saveflag=0;
    } 
    else
    {
        system("cls");
        printf("没有货物信息,没有货物信息保存\n");
        getchar();
    }
    fclose(out); /*关闭此文件*/
}
void Er_Save(Link L)
{
    FILE *out;
    Node *p;
    int count=0;
    if ((out=fopen("d:\\Goods","wb"))==NULL)
    {
        printf("打开文件失败!\n");
        getchar();
        return;
    }
    p=L->next;
    while (p)
    {
        if (fwrite(p,sizeof(Node),1,out))
        {
            p=p->next;
            count++;
        }
        else
        {
            break;
        }
    }
    if (count>0)
    {
        getchar();
        printf("\n\n\n***二进制文件保存完成,共%d条货物信息保存***\n",count);
        getchar();
        saveflag=0;
    } 
    else
    {
        system("cls");
        printf("没有货物信息,没有货物信息保存\n");
        getchar();
    }
    fclose(out); /*关闭此文件*/
}
void Menu_sort_zg()
{
    system("cls");
    printf("\n\n\n");
    printf("%30s%s"," ","     排序货物信息   \n\n");
    printf("%30s%s"," ","********功能*******\n\n");
    printf("%30s%s"," ","*      1.按名称   *\n\n");
    printf("%30s%s"," ","*      2.按编号   *\n\n");
    printf("%30s%s"," ","*      3.按销量*\n\n");
    printf("%30s%s"," ","*      4.按利润*\n\n");
    printf("%30s%s"," ","*      5.按保期  *\n\n");
    printf("%30s%s"," ","*      6.返回     *\n\n");
    printf("%30s%s"," ","*      7.退出     *\n\n");
    printf("%30s%s"," ","********************\n");
}
void Menu_sort_pt()
{
    system("cls");
    printf("\n\n\n");
    printf("%30s%s"," ","     排序货物信息   \n\n");
    printf("%30s%s"," ","********功能*******\n\n");
    printf("%30s%s"," ","*      1.按名称   *\n\n");
    printf("%30s%s"," ","*      2.按编号   *\n\n");
    printf("%30s%s"," ","*      3.按售价   *\n\n");
    printf("%30s%s"," ","*      4.按销量  *\n\n");
    printf("%30s%s"," ","*      5.按保期  *\n\n");
    printf("%30s%s"," ","*      6.返回     *\n\n");
    printf("%30s%s"," ","*      7.退出     *\n\n");
    printf("%30s%s"," ","********************\n");
}
void Menu_del()
{
    system("cls");
    printf("\n\n\n");
    printf("%30s%s"," ","     删除货物信息   \n\n");
    printf("%30s%s"," ","********功能*******\n\n");
    printf("%30s%s"," ","*      1.按名称   *\n\n");
    printf("%30s%s"," ","*      2.按编号   *\n\n");
    printf("%30s%s"," ","*      3.返回     *\n\n");
    printf("%30s%s"," ","*      4.退出     *\n\n");
    printf("%30s%s"," ","********************\n");
}
void Menu_Sea()
{
    system("cls");
    printf("\n\n\n");
    printf("%30s%s"," ","     查询货物信息   \n\n");
    printf("%30s%s"," ","********功能*******\n\n");
    printf("%30s%s"," ","*      1.按名称   *\n\n");
    printf("%30s%s"," ","*      2.按编号   *\n\n");
    printf("%30s%s"," ","*      3.返回     *\n\n");
    printf("%30s%s"," ","*      4.退出     *\n\n");
    printf("%30s%s"," ","********************\n");
}
void Menu_Qx()                   /*权限菜单*/
{
    system("cls");
    printf("\n\n\n");
    printf("%25s%s"," ","        欢迎进入             \n");
    printf("%25s%s"," ","     货物管理体统   \n\n\n");
    printf("%25s%s"," ","**********功能*********\n\n");
    printf("%25s%s"," ","*        1.主管       *\n\n");
    printf("%25s%s"," ","*        2.普通用户   *\n\n");
    printf("%25s%s"," ","*        3.退出       *\n\n");
    printf("%25s%s"," ","***********************\n");
}
void Menu_zg()                       /*主管菜单*/
{
    system("cls");
    printf("\n\n\n");
    printf("%15s%s"," ","               货物管理体统                               \n\n\n");
    printf("%15s%s"," ","*****************主管功能******************\n\n");
    printf("%15s%s"," ","*              1.录入货物信息             *\n");
    printf("%15s%s"," ","*              2.删除货物信息             *\n");
    printf("%15s%s"," ","*              3.查找货物信息             *\n");
    printf("%15s%s"," ","*              4.显示货物信息             *\n");
    printf("%15s%s"," ","*              5.差10天过物信息(促销)    *\n");
    printf("%15s%s"," ","*              6.统计货物数量(补货)     *\n");
    printf("%15s%s"," ","*              7.实时收益                 *\n");
    printf("%15s%s"," ","*              9.排序日期差               *\n");
    printf("%15s%s"," ","*              10.保存文件                *\n");
    printf("%15s%s"," ","*              11.返回                    *\n");
    printf("%15s%s"," ","*              12.退出                    *\n");
    printf("%15s%s"," ","*******************************************\n");
}
void Menu_pt()                        /*普通菜单*/
{
    printf("%15s%s"," ","               货物管理体统                               \n\n\n");
    printf("%15s%s"," ","*****************普通用户功能***************\n\n");
    printf("%15s%s"," ","*              1.查找货物信息                   *\n");
    printf("%15s%s"," ","*              2.显示货物信息                   *\n");
    printf("%15s%s"," ","*              3.排序货物销量                   *\n");
    printf("%15s%s"," ","*              4.返回                           *\n");
    printf("%15s%s"," ","*              5.退出                          *\n");
    printf("%15s%s"," ","*************************************************\n");
}
void Isaveflag(Link L)
{
    char ch;
    if (saveflag)
    {
        printf("您已经修改数据了,是否要保存退出(y/n):");
        getchar();
        scanf("%c",&ch);
        if (ch=='y'||ch=='Y')
        {
            Wb_Save(L);
            Er_Save(L);
            exit(0);
        }
        else
            exit(0);
    }
    else
        exit(0);
}
int IsPassword()                      /*密码是否通过*/
{
    char password[7];
    char mypassword[]="123456";
    static int n=3;
    int i;
    system("cls");
    for (;n>0;n--)
    {
        switch(n)
        {
        case 1:
        case 2: printf("密码错误,您还有%d次机会,请再输入:",n);break;
        case 3: printf("请输入6位进入主管功能的密码:");getchar();break;
        }
        for ( i=0;i<6;i++)
        {
            password[i]=getch();
            printf("*");
        }
        getchar();
        password[6]='\0';
        if (strcmp(mypassword,password)==0)
        {
            printf("***密码正确***");
            getchar();
            return 1;
        }
    }
    printf("恭喜你,三次都输错了,无法再输入密码,按任意键返回...");
    getchar();
    return 0;
}
void Sort_goods(Link L,char s[])
{
    if (!L->next)
    {
        system("cls");
        printf("\n没有货物信息,无法使用排序功能\n");
        getchar();
        return;
    } 
    else
    {
        if (strcmp(zg,s)==0)
        {
            system("cls");
            for (;;)
            {
                Menu_sort_zg();
                switch(select(1,7))
                {
                case 1:Sort_by_ways(L,zg,1);break;    /*名称*/
                case 2:Sort_by_ways(L,zg,2);break;     /*编号*/
                case 3:Sort_by_ways(L,zg,3);break;     /*销量*/
                case 4:Sort_by_ways(L,zg,4);break;     /*利润*/
                case 5:Sort_by_ways(L,zg,5);break;     /*保期*/
                case 6:return;break;
                case 7:Isaveflag(L);break;
                }
                getchar();
            }
        } 
        else
        {
            system("cls");
            for (;;)
            {
                Menu_sort_pt();
                switch(select(1,7))
                {
                case 1:Sort_by_ways(L,pt,1);break;        /*名称*/ 
                case 2:Sort_by_ways(L,pt,2);break;        /*编号*/
                case 3:Sort_by_ways(L,pt,3);break;        /*售价*/
                case 4:Sort_by_ways(L,pt,4);break;        /*销量*/
                case 5:Sort_by_ways(L,pt,5);break;        /*销量*/
                case 6:return;break;
                case 7:Isaveflag(L);break;
                }
                getchar();
            }
        }
    }
}
void Sea_goods(Link L,char s[])
{
    if (!L->next)
    {
        system("cls");
        printf("\n***没有货物记录,不能进入查询功能***\n");
        return ;
    } 
    else
    {
        system("cls");
        for (;;)
        {
            Menu_Sea();
            switch(select(1,4))
            {
            case 1:Sea_by_name(L,s);break;
            case 2:Sea_by_num(L,s);break;
            case 3:return;break;
            case 4:Isaveflag(L);break;
            }
            getchar();
        }
    }
}
void Del_goods(Link L)
{
    if (!L->next)
    {
        system("cls");
        printf("\n***没有货物记录,不能使用删除功能***\n");
        return ;
    }
    else
    {
        system("cls");
        for (;;)
        {
            Menu_del();
            switch (select(1,4))
            {
            case 1:Del_by_name(L);break;
            case 2:Del_by_num(L);break;
            case 3:return;break;
            case 4:Isaveflag(L);break;
            }
            getchar();
        }
    }
}
void main_zg(Link L)                        /*主管功能*/
{
    system("cls");
    for (;;)
    {
        Menu_zg();
        switch (select(1,12))
        {
        case 1:Add_goods(L);saveflag=1;break;                 /*增加货物信息*/
        case 2:Del_goods(L);break;                 /*删除学生信息*/
        case 3:Sea_goods(L,zg);break;         /*按编号名字查询*/
        case 4:system("cls");Disp(L,zg);break;  
        case 5:Dz_by_data(L);break;
        case 6:Buhuo(L);break;
        case 7:Disp(L,zg);Sum_Income(L);Disp(L,zg);break;
        case 9:Sort_goods(L,zg);break;
        case 10:Wb_Save(L);Er_Save(L);break;
        case 11:return;break;
        case 12:Isaveflag(L);break;
        }
        getchar();
    }
}
void main_pt(Link L)                        /*普通功能*/
{
    system("cls");
    for (;;)
    {
        Menu_pt();
        switch (select(1,5))
        {
        case 1:Sea_goods(L,pt);break;         /*按编号名字查询*/
        case 2:system("cls");Disp(L,pt);break;  
        case 3:Sort_goods(L,pt);break;
        case 4:return;break;
        case 5:Isaveflag(L);break;
        }
        getchar();
        system("cls");
    }
}
int main()
{
    Link L;
    FILE *in;
    Node *p,*r;
    int count=0;
    L=(Node *)malloc(sizeof(Node));
    L->next=NULL;
    r=L;
    if ((in=fopen("d:\\Goods","ab+"))==NULL) /*以追加方式打开二进制文件*/
    {
        printf("\n***打开文件失败***\n");
        exit(0);
    }
    while (!feof(in))
    {
        p=(Node *)malloc(sizeof(Node));
        if (fread(p,sizeof(Node),1,in))
        {
            p->next=r->next;
            r->next=p;
            count++;
        }
    }
    fclose(in);
    for (;;)
    {
        Menu_Qx();
        switch (select(1,3))
        {
        case 1:if(IsPassword())
               {
                   main_zg(L);
               }
               break;
        case 2:main_pt(L);break;
        case 3:Isaveflag(L);break;
        }
        getchar();
    }
    return 0;
}

10、C语言歌曲信息管理系统

#include "stdio.h" 
#include "stdlib.h" 
#include "string.h" 
//歌曲信息包括:歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司 
typedef struct music 
{ 
  char name[20];  //歌名 
  char singer[20]; //演唱者 
  char authors[20]; //作词 
  char compose[30]; //作曲 
  char album[20];  //所属专辑 
  char time[15];  //出版时间 
  char company[30]; //出版公司 
  struct music *next; 
}music; 
music *head=NULL; 
int length;  //链表的长度 
void create() 
{ 
  music *p1,*p2; 
  length=0; 
  p1=(music *)malloc(sizeof(music)); 
  strcpy(p1->name,"-1"); 
  if(head==NULL) 
    head=p1; 
  printf("请输入音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
  while(1) //歌名为0的时候退出 
  { 
    p2=(music *)malloc(sizeof(music)); 
    //输入歌曲信息 
    scanf("%s %s %s %s %s %s %s",p2->name,p2->singer,p2->authors,p2->compose,p2->album,p2->time,p2->company); 
    if(strcmp(p2->name,"0")==0) 
    { 
      printf("链表创建完成!/n"); 
      break; 
    } 
    length++; //链表的长度 
    p1->next=p2; 
    p2->next=NULL; 
    p1=p1->next; 
  } 
  return ; 
} 
void ModifymusicInfo() 
{ 
  music *p=head->next; 
  char name[20]; 
  printf("请输入要修改的歌曲的歌名:"); 
  getchar(); 
  scanf("%s",name); 
  while(p!=NULL) 
  { 
    if(strcmp(p->name,name)==0) 
    { 
      printf("修改前,歌名为%s的歌曲的信息如下:/n",name); 
      printf("音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
      printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      printf("请输入歌曲的新的所属专辑:"); 
      getchar(); 
      scanf("%s",p->album); 
      printf("请输入歌曲的新出版公司:"); 
      getchar(); 
      scanf("%s",p->company); 
      printf("修改后,歌名为%s的歌曲的信息如下:/n",name); 
      printf("音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
      printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      return ; 
    } 
    p=p->next; 
  } 
  if(p==NULL) 
  { 
    printf("该歌曲不存在!/n"); 
    return ; 
  } 
} 
 
void display() 
{ 
  music *p=head->next; 
  printf("链表中所有的歌曲信息如下:/n"); 
  printf("音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
  while(p!=NULL) 
  { 
    printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
    p=p->next; 
  } 
  return ; 
} 
void search() 
{ 
  int num,x,flag; 
  char name[20]; 
  music *p=head->next; 
  printf("请选择查询的方式:/n"); 
  printf("1、按歌名查询/t 2、按演唱者查询/n"); 
  scanf("%d",&x); 
  if(x==1) 
  { 
    printf("需要查找的歌曲歌名为:"); 
    getchar(); 
    scanf("%s",name); 
    while(p!=NULL) 
    { 
 
      if(strcmp(p->name,name)==0) 
      { 
        printf("歌名为%s的歌曲的信息如下:/n",name); 
        printf("音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
        printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
        return ; 
      }   
      p=p->next; 
    } 
    if(p==NULL) 
      printf("没有这首歌曲的记录!/n"); 
  } 
  else if(x==2) 
  { 
    flag=0; 
    printf("需要查找的演唱者为:"); 
    getchar(); 
    scanf("%s",name); 
    p=head->next; 
    while(p!=NULL) 
    { 
      if(strcmp(p->singer,name)==0) 
      { 
        if(flag==0) 
        { 
          printf("演唱者为%s的歌曲的信息如下:/n",name); 
          printf("音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
          flag=1; 
        } 
        printf("%s %s %s %s %s %s %s/n",p->name,p->singer,p->authors,p->compose,p->album,p->time,p->company); 
      }   
      p=p->next; 
    } 
    if(p==NULL && flag==0) 
    { 
      printf("没有该演唱者的歌曲记录!/n"); 
      return; 
    } 
  } 
  return ; 
} 
 
void insert() 
{ 
  int num,i; 
  music *p,*q; 
  p=head; 
 
  printf("请输入你要插入位置: "); 
  scanf("%d",&num); 
  if(num>length) 
  { 
    printf("找不到要插入的位置/n"); 
    return ; 
  } 
  else 
  { 
    printf("请输入你要插入的音乐的歌名、演唱者、作词、作曲、所属专辑、出版时间、出版公司:/n"); 
    q=(music *)malloc(sizeof(music)); 
    //输入歌曲信息 
    scanf("%s %s %s %s %s %s %s",q->name,q->singer,q->authors,q->compose,q->album,q->time,q->company); 
    while(p!=NULL) 
    { 
      if(strcmp(p->name,q->name)==0) 
      { 
        printf("该歌曲已经存在,无法插入!/n"); 
        return ; 
      } 
      p=p->next; 
    } 
    p=head; 
    for(i=0;i<num;i++) 
      p=p->next; 
    q->next=p->next; 
    p->next=q; 
    length++; 
    printf("插入成功!/n"); 
    return ; 
  } 
}  
 
void Delete() 
{ 
  char name[20]; 
  music *p,*q; 
  q=head,p=head->next; 
  printf("请输入要删除的歌曲的歌名:/n"); 
  getchar(); 
  scanf("%s",name); 
 
  while(p!=NULL) 
  { 
    if(strcmp(p->name,name)==0) 
    { 
      q->next=p->next; 
      free(p); 
      length--; 
      printf("删除成功!/n"); 
      return ; 
    } 
    p=p->next; 
    q=q->next; 
  } 
  if(p==NULL) 
  { 
    printf("找不到要删除的歌曲!/n"); 
    return ; 
  } 
} 
void menu() 
{ 
  printf("________________________________________________________________/n"); 
  printf("|       歌厅歌曲管理系统                |/n"); 
  printf("|        0、 退出系统                  |/n"); 
  printf("|        1、 录入歌曲信息                |/n"); 
  printf("|        2、 显示歌曲信息                |/n"); 
  printf("|        3、 查找链表中的某一首歌曲           |/n"); 
  printf("|        4、 删除链表中指定歌曲             |/n"); 
  printf("|        5、 指定的位置上插入一个新结点         |/n"); 
  printf("|        6、 修改歌曲信息                |/n"); 
  printf("________________________________________________________________/n"); 
  return ; 
} 
int main(void) 
{ 
  int a; 
  menu(); 
  while(1) 
  { 
    printf("请选择相应的功能:"); 
    scanf("%d",&a); 
    switch(a) 
    { 
    case 0: 
      return 0; 
    case 1: 
      create(); 
      menu(); 
      break; 
    case 2: 
      if(head) 
      { 
        display(); 
        menu(); 
      } 
      else 
      { 
        printf("链表为空,请先建立链表!/n"); 
        menu(); 
      } 
      break; 
    case 3: 
      if(head) 
      { 
        search(); 
        menu(); 
      } 
      else 
      { 
        printf("链表为空,请先建立链表!/n"); 
        menu(); 
      } 
      break; 
    case 4: 
      if(head) 
      { 
        Delete(); 
        menu(); 
      } 
      else 
      { 
        printf("链表为空,请先建立链表!/n"); 
        menu(); 
      } 
      break; 
    case 5: 
      if(head) 
      { 
        insert(); 
        menu(); 
      } 
      else 
      { 
        printf("链表为空,请先建立链表!/n"); 
        menu(); 
      } 
      break; 
    case 6: 
      if(head) 
      { 
        ModifymusicInfo(); 
        menu(); 
      } 
      else 
      { 
        printf("链表为空,请先建立链表!/n"); 
        menu(); 
      } 
      break; 
    default: 
      break; 
    } 
  } 
  system("pause"); 
  return 0; 
} 

11、C语言职工信息管理系统源码

#include <stdio.h> 
#include <stdlib.h> 
#include <string.h> 
#include <conio.h> 
struct worker 
{ 
 char ID[20];//工号 
 char name[20];//姓名 
 char sex[5];//性别 
 char born[20];//生日 
 char edu[20];//学历 
 char position[20];//职务 
 char wage[10];//工资 
 char address[100];//住址 
 char tel[15];//电话 
}work[1000]; 
int n ; 
 
//文件读写模块 
void read()//读入数据 
{ 
 FILE *fp; 
 int i = 0; 
 if( (fp = fopen("d:\\date.txt","r")) == NULL ) 
 { 
  printf("请在D盘根目录下新建一个文本文件,文件名为date\n\n\n"); 
  system("pause"); 
  system("cls"); 
  return ; 
 } 
 fscanf(fp,"%d\n",&n); 
 while(i < n) 
 { 
  fscanf(fp,"%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",work[i].ID,work[i].name,work[i].sex,work[i].born,work[i].edu,work[i].position,work[i].wage,work[i].address,work[i].tel); 
  i ++; 
 } 
 fclose(fp); 
} 
void write()//写入数据 
{ 
 FILE *fp; 
 int i = 0; 
 if( (fp = fopen("d:\\date.txt","w")) == NULL ) 
 { 
  printf("无法打开文件!\n"); 
  return ; 
 } 
 fprintf(fp,"%d\n",n); 
 while(i < n) 
 { 
  fprintf(fp,"%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",work[i].ID,work[i].name,work[i].sex,work[i].born,work[i].edu,work[i].position,work[i].wage,work[i].address,work[i].tel); 
  i ++; 
 } 
 fclose(fp); 
} 
 
 
//输入模块 
void input()// 从键盘输入 
{ 
 int i; 
 int flag;//标记工号是否已存在 
 char c;//指令Y?N 
 read();//输入数据前先将文件中原有的数据读入 
 do 
 { 
  flag = 0; 
  printf("\t\t请输入职工的工号:        \n\t\t"); 
  scanf("%s",work[n].ID); 
  for(i = 0 ; i < n ; i ++) 
  { 
   if(strcmp(work[i].ID,work[n].ID) == 0) 
   { 
    flag = 1; 
    break; 
   } 
  } 
  if(flag) 
  { 
   printf("该工号已存在!\n\n"); 
   printf("\t\t是否继续输入?(Y/N): "); 
   scanf("%*c%c",&c); 
   if(c == 'N' || c == 'n') break; 
   continue; 
  } 
  printf("\t\t请输入职工的姓名:        \n\t\t"); 
  scanf("%s",work[n].name); 
  printf("\t\t请输入职工的性别:        \n\t\t"); 
  scanf("%s",work[n].sex); 
  printf("\t\t请输入职工的出生年月:       \n\t\t"); 
  scanf("%s",work[n].born); 
  printf("\t\t请输入职工的学历:        \n\t\t"); 
  scanf("%s",work[n].edu); 
  printf("\t\t请输入职工的职务:        \n\t\t"); 
  scanf("%s",work[n].position); 
  printf("\t\t请输入职工的工资:        \n\t\t"); 
  scanf("%s",work[n].wage); 
  printf("\t\t请输入职工的住址:        \n\t\t"); 
  scanf("%s",work[n].address); 
  printf("\t\t请输入职工的电话:        \n\t\t"); 
  scanf("%s",work[n].tel); 
  printf("\t\t是否继续输入?(Y/N): "); 
  scanf("%*c%c",&c); 
  n ++; 
 }while( c != 'N' && c != 'n'); 
 write(); 
 printf("\n\n数据已保存!\n\n"); 
} 
 
 
//显示模块 
void output_inf(int id) 
{ 
 printf("\t\t 工号: %s\n",work[id].ID); 
 printf("\t\t 姓名: %s\n",work[id].name); 
 printf("\t\t 性别: %s\n",work[id].sex); 
 printf("\t\t出生年月: %s\n",work[id].born); 
 printf("\t\t 学历: %s\n",work[id].edu); 
 printf("\t\t 职务: %s\n",work[id].position); 
 printf("\t\t 工资: %s\n",work[id].wage); 
 printf("\t\t 住址: %s\n",work[id].address); 
 printf("\t\t 电话: %s\n",work[id].tel); 
 printf("\n\n\n"); 
} 
void show()//显示所有职工信息 
{ 
 int i; 
 read(); 
 if(n == 0) printf("无记录!\n\n"); 
 else 
  for(i = 0 ; i < n ; i ++) 
  { 
   output_inf(i); 
  } 
} 
 
 
//查询模块 
void que()//查询信息 
{ 
 char num; 
 int flag,i; 
 char q_id[20] ;//查询工号 
 char q_name[20] ;//查询姓名 
 char q_edu[20] ; //查询学历 
 char q_position[20] ;//查询职位 
 char c;//指令Y?N 
 read();//打开程序后,要查询以前的数据,要先读入 
 while(1) 
 { 
  system("cls"); 
  printf("\t\t******************查询********************\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    1.按工号查询    *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    2.按姓名查询    *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    3.按学历查询    *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    4.按职务查询    *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*  输入其他任意键退出本模块   *\n"); 
  printf("\t\t******************************************\n"); 
  printf("\t\t请输入指令(1-4):"); 
  scanf("%*c%c",&num); 
  if(num < '1' || num > '4') 
  { 
   printf("错误指令!\n\n"); 
   system("pause"); 
   continue; 
  } 
  system("cls"); 
  flag = 0;//用来标记职工信息是否存在 
  if(num == '1')//按工号查询 
  { 
   printf("\t\t请输入您要查询职工的工号:"); 
   scanf("%s",q_id); 
   for(i = 0 ; i < n ;i ++) 
   { 
    if( strcmp(work[i].ID,q_id) == 0) 
    { 
     output_inf(i); 
     flag = 1;//标记 
     break; 
    } 
   } 
  } 
  else if(num == '2')//按姓名查询 
  { 
   printf("\t\t请输入您要查询职工的姓名:"); 
   scanf("%s",q_name); 
   for(i = 0 ; i < n ;i ++) 
   { 
    if( strcmp(work[i].name,q_name) == 0) 
    { 
     output_inf(i); 
     flag = 1;//标记 
    } 
   } 
  } 
  else if(num == '3')//按学历查询 
  { 
   printf("\t\t请输入您要查询职工的学历:"); 
 
   scanf("%s",q_edu); 
   for(i = 0 ; i < n ;i ++) 
   { 
    if( strcmp(work[i].edu,q_edu) == 0) 
    { 
     output_inf(i); 
     flag = 1;//标记 
    } 
   } 
  } 
  else if(num == '4')//按职务查询 
  { 
   printf("\t\t请输入您要查询职工的职务:"); 
   scanf("%s",q_position); 
   for(i = 0 ; i < n ;i ++) 
   { 
    if( strcmp(work[i].position,q_position) == 0) 
    { 
     output_inf(i); 
     flag = 1;//标记 
    } 
   } 
  } 
  if(!flag)//判断是否有该职工信息 
  { 
   printf("\n\n无该职工信息!\n\n"); 
  } 
  printf("\n\n是否继续查询(Y/N):"); 
 
  scanf("%*c%c",&c); 
  if(c == 'N' || c == 'n') break; 
 } 
} 
 
//修改信息模块 
void mod()//修改职工信息 
{ 
 char change_ID[20];//需修改的职工的工号 
 int number;//职工信息在数据中的位置 
 char num;//指令 
 char message[100];//修改的信息 
 char c;//指令Y?N 
 int flag; 
 int i; 
 read(); 
 while(1) 
 { 
  flag = 0; 
  system("cls"); 
  printf("请输入需修改的职工的工号:"); 
  scanf("%s",change_ID); 
  for(i = 0 ; i < n ; i ++) 
  { 
   if( strcmp(work[i].ID,change_ID) == 0 ) 
   { 
    number = i; 
    flag = 1; 
    break; 
   } 
  } 
  if(!flag) 
  { 
   printf("\n\n无此员工信息!!\n\n"); 
   printf("\n\n是否继续修改(Y/N):"); 
   scanf("%*c%c",&c); 
   if(c == 'N' || c == 'n') break; 
   continue; 
  } 
  printf("\n\n\t\t******************修改********************\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    1.修改姓名     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    2.修改学历     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    3.修改职务     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    4.修改工资     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    5.修改住址     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*    6.修改电话     *\n"); 
  printf("\t\t*          *\n"); 
  printf("\t\t*  输入其他任意键退出本模块   *\n"); 
  printf("\t\t******************************************\n"); 
  printf("\t\t请输入指令(1-6):"); 
  scanf("%*c%c",&num); 
  if(num < '1' || num > '6') 
  { 
   printf("错误指令!\n\n"); 
   system("pause"); 
   continue; 
  } 
  system("cls"); 
  printf("请输入修改后的信息:"); 
  scanf("%s",message); 
  switch(num) 
  { 
   case '1' : strcpy(work[number].name,message); break; 
   case '2' : strcpy(work[number].edu,message); break; 
   case '3' : strcpy(work[number].position,message); break; 
   case '4' : strcpy(work[number].wage,message); break; 
   case '5' : strcpy(work[number].address,message); break; 
   case '6' : strcpy(work[number].tel,message); break; 
  } 
  system("cls"); 
  printf("\n\n是否继续修改(Y/N):"); 
  scanf("%*c%c",&c); 
  if(c == 'N' || c == 'n') break; 
 } 
 write(); 
} 
 
 
//删除信息模块 
void del()//删除职工信息 
{ 
 char delete_ID[20];//删除职工工号 
 int i,j; 
 int flag;//标记是否有该职工信息 
 char c; 
 read(); 
 while(1) 
 { 
  system("cls"); 
  flag = 0; 
  printf("请输入需删除职工信息的工号:"); 
  scanf("%s",delete_ID); 
  for(i = 0 ; i < n ; i ++) 
  { 
   if( strcmp(work[i].ID,delete_ID) == 0) 
   { 
    n --; 
    flag = 1; 
    for(j = i ; j < n ; j ++) 
    { 
     work[j] =work[j + 1]; 
    } 
    break; 
   } 
  } 
  if(!flag) printf("\n\n无此员工信息!\n\n"); 
  else printf("\n\n删除成功!\n"); 
  printf("\n\n是否继续删除(Y/N):"); 
  scanf("%*c%c",&c); 
  if(c == 'N' || c == 'n') break; 
 } 
 write(); 
} 
 
//菜单模块 
void menu()//菜单 
{ 
 printf("\t\t************职工信息管理系统菜单**********\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    1.录入职工信息   *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    2.显示职工信息   *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    3.查询职工信息   *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    4.修改职工信息   *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    5.删除职工信息   *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t*    0.退出     *\n"); 
 printf("\t\t*          *\n"); 
 printf("\t\t******************************************\n"); 
 printf("\t\t请输入指令(0-5): "); 
} 
 
 
int main() 
{ 
 int num; 
 n = 0; 
 system("color 0B"); 
 while(1) 
 { 
  menu(); 
  scanf("%d",&num); 
  system("cls"); 
  switch(num) 
  { 
   case 1: input(); break; 
   case 2: show(); break; 
   case 3: que(); break; 
   case 4: mod(); break; 
   case 5: del(); break; 
   case 0: printf("谢谢使用!\n\n"); return 0; 
   default :printf("\n--->无效的指令!\n\n\n"); 
  } 
  system("pause"); 
  system("cls"); 
 } 
} 

12、C语言学生打卡系统

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

FILE *fp; //定义文件
char a;  //返回选择变量
float kq = 10;  //应到打卡次数

 struct student
{
 char name[10];   //姓名
 char number[11];  //学号
 char sex;      //性别
 int year;      //出生日期--年
 int month;     //出生日期--月
 int day;      //出生日期--日
 int k;       //打卡次数
}stu[100];

void input();
void change();
void search();
void times();
void evaluate();
int main();

int main()
{
 int it = 0;
 printf("\t\t★★★★★★★★★★★★★★★★★★★★★★★★\n");
 printf("\t\t★     ※欢迎进入学生考勤系统       ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     1.学生信息及打卡情况录入      ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     2.修改某个学生的打卡情况      ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     3.查询某个学生的打卡记录      ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     4.旷课学生的姓名及次数       ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     5.学生打卡的总评分数计算      ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★     6.退出系统             ★\n");
 printf("\t\t★                      ★\n");
 printf("\t\t★★★★★★★★★★★★★★★★★★★★★★★★\n");
 printf("\t *******请选择您需要的操作******* ");
 scanf("%d", &it);
 switch (it)
 {
 case 1: input(); break;
 case 2:change(); break;
 case 3:search(); break;
 case 4:times(); break;
 case 5:evaluate(); break;
 case 6:      break;
 default: printf("请重新输入!\n");
 }
 if (it == 6)
 printf("\t\t\t退出考勤系统,欢迎下次使用!");
 system("pause");
 return 0;
}

void input()
{
 int i = 0;
 int j = 0;
 int x = 1;
 printf("************1.学生信息及打卡情况录入************\n");
 if ((fp = fopen("data.txt", "w")) == NULL)
 {
 printf("文件打开失败! \n");
 main();
 }
 for (i = 0; x == 1; i++)
 {
 for (; j == 0;)
 {
  getchar();
  printf("请输入第%d个学生的姓名:", i + 1);
  gets(stu[i].name);
  printf("请输入第%d个学生的学号:", i + 1);
  gets(stu[i].number);
  printf("请输入第%d个学生的性别(男-m 女-f):", i + 1);
  stu[i].sex = getchar();
  printf("请输入第%d个学生的出生日期(格式:年-月-日):", i + 1);
  scanf("%d%d%d", &stu[i].year, &stu[i].month, &stu[i].day);
  printf("请输入第%d个学生当前的打卡次数:", i + 1);
  scanf("%d", &stu[i].k);
  printf("您输入的信息为: 姓名%s 学号%s  性别%c  出生日期 %d年%d月%d日  打卡次数%d \n ",
  stu[i].name, stu[i].number, stu[i].sex,stu[i].year, stu[i].month, stu[i].day, stu[i].k);
  printf("请确定信息 (重输-0 确定-1): ");
  scanf("%d", &j); //输入确认
 } 
 j = 0;
 if (fwrite(&stu[i], sizeof(struct student), 1, fp) != 1)
  printf("文件写入错误! \n"); // 写入文件
 printf("是否继续输入下一个学生的信息 终止-0 继续-1: ");
 scanf("%d", &x);  //继续输入的选择
 }
 fclose(fp);
 printf("返回主菜单-0 :");
 getchar();
 a = getchar();
 getchar();
 if (a == '0')
 main();   //返回主菜单
}   //录入数据函数结束

void change()
{
 printf("************2.修改某个学生的打卡情况************\n");
 int i = 0;
 int j = 0;
 int t = 10;
 int it = 10;
 int x = 10;;
 char name[10] = { 0 };
 char number[10] = { 0 };
 if ((fp = fopen("data.txt", "r")) == NULL)  //将文件内容读入内存
 {
 printf("文件打开失败! \n");
 main();
 }
 for (i = 0; feof(fp) == 0; ++i)
 {
 fread(&stu[i], sizeof(struct student), 1, fp); //读取文件内容
 }
 printf("选择修改对象:按姓名查找-1 按学号查找-2: ");
 scanf("%d", &it);
 if (it == 1)   //按姓名查找开始
 {
 printf("请输入需要修改学生的姓名: ");
 scanf("%s", &name);
 for (j = 0; t != 0; j++)
  t = strcmp(stu[j].name, name);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
  fclose(fp);
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  性别%c  打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].sex, stu[j - 1].k);
 }
 printf("是否确认修改该生打卡信息 否-0 是-1: ");
 scanf("%d", &x);
 if (x == 1)
 {
  printf("请输入新的打卡次数: ");
  scanf("%d", &stu[j-1].k);  //输入新的打卡次数
  if ((fp = fopen("data.txt", "w")) == NULL) //以只写方式打开
  {
  printf("文件打开失败! \n");
  main();
  }
  if (fwrite(&stu[j], sizeof(struct student), 1, fp) != 1)
  printf("文件写入错误! \n");  //写入文件
 }
 fclose(fp);
 }//按姓名查找结束
 if (it == 2)  //按学号查找开始
 {
 printf("请输入需要修改学生的学号:");
 scanf("%s", &number);
 for (j = 0; t != 0; j++)
  t = strcmp(stu[j].number, number);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  性别%c 打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].sex, stu[j - 1].k);
 }
 printf("是否确认修改该生打卡信息 否-0 是-1:");
 scanf("%d", &x);
 if (x == 1)
 {
  printf("请输入新的打卡次数: ");
  scanf("%d", &stu[j-1].k);  //输入新的打卡次数
  if ((fp = fopen("data.txt", "w")) == NULL) //以只写方式打开
  {
  printf("文件打开失败! \n");
  main();
  }
  if (fwrite(&stu[j], sizeof(struct student), 1, fp) != 1)
  printf("文件写入错误! \n");  //写入文件
 }
 fclose(fp);
 }//按学号查询结束
 printf("是否继续修改其他学生打卡信息 返回主菜单-0 继续-1: ");
 scanf("%d", &x);
 if (x == 1) change();
 else    main(); //返回主菜单   
}  //修改数据函数内容结束


void search()
{
 printf("************3.查询某个学生的打卡记录************\n");
 int i = 0;
 int j = 0;
 int it = 10;
 int t = 10;
 int x = 10;
 char name[10] = { 0 };
 char number[10] = { 0 };
 if ((fp = fopen("data.txt", "r")) == NULL)  //将文件内容读入内存
 {
 printf("文件打开失败! \n");
 main();
 }
 for (i = 0; feof(fp) == 0; ++i)
 {
 fread(&stu[i], sizeof(struct student), 1, fp); //读取文件内容
 }
 printf("选择查找方式:按姓名查找-1 按学号查找-2: ");
 scanf("%d", &it);
 if (it == 1)   //按姓名查找开始
 {
 printf("请输入需要查询学生的姓名: ");
 scanf("%s", &name);
 for (j = 0; t != 0; j++)
  t = strcmp(stu[j].name, name);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  性别%c  出生日期 %d年%d月%d日  打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].sex, stu[j - 1].year, stu[j - 1].month, stu[j - 1].day, stu[j - 1].k);
 }
 fclose(fp);
 }//按姓名查询结束
 if (it == 2)  //按学号查找开始
 {
 printf("请输入需要查询学生的学号:");
 scanf("%s", &number);
 for (j = 0; t != 0; j++)
  t = strcmp(stu[j].number, number);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  性别%c  出生日期 %d年%d月%d日  打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].sex, stu[j - 1].year, stu[j - 1].month, stu[j - 1].day, stu[j - 1].k);
 }
 fclose(fp);
 }
 printf("是否继续查询其他学生打卡信息 返回主菜单-0 继续-1: ");
 scanf("%d", &x);
 if (x == 1) search();
 else    main(); //返回主菜单  
}

void times()
{
 printf("************4.旷课学生的姓名及次数 ************\n");
 int i = 0;
 int j = 0;
 int it = 0;
 if ((fp = fopen("data.txt", "r")) == NULL)  //将文件内容读入内存
 {
 printf("文件打开失败! \n");
 main();
 }
 for (i = 0; feof(fp) == 0; i++)
 {
 fread(&stu[i], sizeof(struct student), 1, fp); //读取文件内容
 }
 printf("旷课学生的姓名及次数如下:\n ");
 for (j = 0; j < i-1;j++ )
 {
 if (stu[j].k < kq)
 printf("姓名%s 学号%s  缺课次数%f \n ",stu[j].name, stu[j].number, (kq - stu[j].k));
 }
 printf("是否返回主菜单 0否 1是: ");
 scanf("%d", &it);
 if (it == 0) return;
 else main();
}

void evaluate()
{
 printf("************5.学生打卡的总评分数计算************\n");
 int i = 0;
 int j = 0;
 int t = 10;
 int it = 10;
 int x = 10;
 float score=0;
 char name[10] = { 0 };
 char number[10] = { 0 };
 if ((fp = fopen("data.txt", "r")) == NULL) //将文件读入内存
 {
 printf("文件打开失败! \n");
 main();
 }
 for (i = 0; feof(fp) == 0; ++i)
 fread(&stu[i], sizeof(struct student), 1, fp);  //读取文件内容
 printf("选择计算对象:1 按姓名查找 2 按学号查找: ");
 scanf("%d", &it);
 if (it == 1)   //按姓名查找开始
 {
 printf("请输入需要计算分数的学生姓名: ");
 scanf("%s", &name);
 for (j = 0; t != 0; ++j)
  t = strcmp(stu[j].name, name);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
  fclose(fp);
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].k);
  score = stu[j-1].k / kq * 100;
  printf("该生当前打卡总评分为 %5.2f \n", score);
 }
 fclose(fp);
 printf("是否继续计算其他学生打卡分数 0否 1是");
 scanf("%d", &x);
 if (x == 1) evaluate();
 else     main();
 }   //按姓名查找结束
 if (it == 2)  //按学号查找开始
 {
 printf("请输入需要计算分数的学生学号:");
 scanf("%s", &number);
 for (j = 0; t != 0; j++)
  t = strcmp(stu[j].number, number);
 if (j == i)
 {
  t = 0;
  printf("未找到该学生信息,请重新输入! \n");
 }
 if (j < i)  //查询成功
 {
  printf("您查询的信息为: 姓名%s 学号%s  性别%c  打卡日期 %d年%d月%d日  打卡次数%d \n ",
  stu[j - 1].name, stu[j - 1].number, stu[j - 1].sex, stu[j - 1].year, stu[j - 1].month, stu[j - 1].day, stu[j - 1].k);
  score = (float)(stu[j-1].k) / kq * 100;
  printf("该生当前打卡总评分为 %5.2f \n", score);
 }
 fclose(fp);
 printf("是否继续计算其他学生打卡分数 0否 1是");
 scanf("%d", &x);
 if (x == 1) evaluate();
 else     main();
 }  //按学号查找结束
 printf("0 返回主菜单\n");
 getchar();
 a = getchar();
 getchar();
 if (a == '0')
 main(); //返回主菜单     
}

13、C语言小学生计算机辅助教学系统

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int Calculate(int x,char op,int y);/*声明函数Calculate(),计算(x,y)的四则运算(由op定)*/
int CreateRandomNumber();   /*声明函数CreateRandomNumber(),生成一个1-10的随机整数*/
char CreateRandomOperator();  /*声明函数CreateRandomOperator(),随机生成一个运算符号(+、-、*、/)*/
void PrintRandomRightEvaluation(); /*声明函数PrintRandomRightEvaluation(),生成一个题目做对的随机提示*/
void PrintRandomWrongEvaluation(); /*声明函数PrintRandomWrongEvaluation(),生成一个题目做错的随机提示*/
int main()
{
 int a,b,userAnswer,i,rightNumber=0,flag=0;
 /*a,b随机整数,userAnswer是用户答案,i是控制循环的变量,rightNumber是正确答案数,flag成绩标志,当成绩<75分,其值为1*/
 char opChar;         /*opChar是运算符*/
 srand(time(NULL));       /*time(NULL)的返回值作为产生随机数的种子*/
 do{
  for(i=0;i<10;i++)      /*循环10次,做10道题*/
  {
   a=CreateRandomNumber();    /*产生一个随机数赋值给整型变量a*/
   b=CreateRandomNumber();    /*产生一个随机数赋值给整型变量b*/
   opChar=CreateRandomOperator();  /*产生一个随机运算符赋值给字符变量opChar*/
   printf("%d%c%d=?\n",a,opChar,b);  /*输出一个四则运算表达式=?*/
   scanf("%d",&userAnswer);    /*用户输入答案*/
   if(userAnswer==Calculate(a,opChar,b))/*如果答案正确*/
   {
    PrintRandomRightEvaluation(); /*输出一个题目做对的随机提示*/
    rightNumber++;     /*回答正确题数加1*/
   }
   else         /*如果回答不正确*/
   {
    PrintRandomWrongEvaluation(); /*输出一个题目做错的随机提示*/
   }
  }
  printf("Total score is %d\n",rightNumber*10); 
  printf("Rate of correctness is %d%%\n",rightNumber*10);
  if(rightNumber*10<75)     /*如果成绩低于75分*/
  {
   printf("Once Again!\n");
   rightNumber=0;      /*正确答案数清零*/
   flag=1;
  }
 }while(flag);
 return 0;
}
/*函数功能:计算两个数(x,y)的四则运算(运算符由op确定?),返回计算结果值*/
int Calculate(int x,char op,int y)
{
 switch(op)
 {
 case '+': return x+y;
 case '-': return x-y;
 case '*': return x*y;
 case '/': return x/y;
 default:printf("Operator error!\n");return 0;
 }
}
/*函数功能:生成一个1-10的随机整数*/
int CreateRandomNumber()
{
 return rand()%10+1;
}
/*函数功能:随机生成一个运算符号(+,-,*,/)*/
char CreateRandomOperator()
{
 int op;
 op=rand()%4+1;
 switch(op)
 {
 case 1:return '+';
 case 2:return '-';
 case 3:return '*';
 case 4:return '/';
 }
 return 0;
}
/*函数功能:生成一个题目做对的随机提示*/
void PrintRandomRightEvaluation()
{
 int i;
 i=rand()%4+1;
 switch(i)
 {
  case 1:printf("Very good!\n");
    break;
  case 2:printf("Excellent!\n");
    break;
  case 3:printf("Nice work!\n");
    break;
  case 4:printf("Keep up the good work!\n");
    break;
  default:printf("Wrong type!");
 }
}
/*函数功能:生成一个题目做错的随机提示*/
void PrintRandomWrongEvaluation()
{
 int i;
 i=rand()%4+1;
 switch(i)
 {
  case 1:printf("No.Please try again.\n");
    break;
  case 2:printf("Wrong.Try once more.\n");
    break;
  case 3:printf("Don't give up!\n");
    break;
  case 4:printf("Not correct.Keep trying.\n");
    break;
  default:printf("Wrong type!");
 }
}


14、C语言门禁系统

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<time.h>
struct information
{
 char name[10];
 char password[10];
 char profession[20];


};
struct Thelog
{
 char name[10];
 char times[24];
 char num[1];
};
FILE *fp;   //文件指针 
information *head;//链表头指针 
void add_student(information a);  //函数[1]管理员添加学生账号,使用门禁系统 
void delete_student(char names[10]);//函数[2]管理员员删除学生账号,解除使用门禁系统权限 
void administrator_login();  //函数[3]管理员登陆 
void administrator_management(); //函数[4]管理员操作界面,添加学生账号,删除学生账号,查看学生使用门禁情况 
void student_login();   //函数[5]学生登陆,用于打开门禁 
void time ();     //函数[6]时间函数,用于显示登陆时间 
void All_output();    //函数[7]全部学生信息 
void the_log(information a,char num[1]); //函数[8]录入学生使用门禁情况 
void log_output();       //函数[9]输出学生使用门禁情况 
void replace_massage(char names[10]);  //函数[10]更改学生信息,只有管理员有权限 
int main()
{
 int n;
 printf("   *********************************************\n");
 printf("   *   欢迎使用四海门禁系统!!!  *\n");
 printf("   *********************************************\n");
 printf("\n");
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*\n");
 printf("   *输入0:退出系统; 输入1:管理员登陆; 输入2:学生登陆*\n");
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*\n");
 printf(" ");
 scanf("%d",&n);
 while(n!=0)
 {
 if(n==1)
  administrator_login();
 else if(n==2)
  student_login();

 else if(n>10||n<0)
 {
  printf("   *********************************************\n");
  printf("   *   欢迎使用四海门禁系统!!!  *\n");
  printf("   *********************************************\n");break;
 }
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*\n");
 printf("   *输入0:退出系统; 输入1:管理员登陆; 输入2:学生登陆*\n");
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*\n");
  printf(" ");
  scanf("%d",&n);
 }
  printf("   *********************************************\n");
  printf("   *   欢迎使用四海门禁系统!!!  *\n");
  printf("   *********************************************\n");
 return 0;
}
void administrator_login()   //管理员登录 
{
 information a;

 printf(" 请输入管理员账号:");
 scanf("%s",a.name);
 printf(" 请输入管理员密码:");
 scanf("%s",a.password);
 if(strcmp(a.name,"管理员")==0&&strcmp(a.password,"123456789")==0)
  {
  printf("\n");
  printf(" *********管理员登陆成功!!!*********\n\n");
  administrator_management();
  }
  else
  {
  printf( "    管理员登陆失败!!!请检查仔细核对账号、密码\n"); 
  }

}
void administrator_management() //管理员操作台 
{
 int num;
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/**/*/*/*\n");
 printf("   *输入1:注册学生账号   输入2:删除账号  输入3:显示所有学生信息*\n"); 
 printf("   *输入4;查看学生使用门禁情况 输入5:修改学生信息 输入6:刷新屏幕  *\n");
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/**/*/*/*\n");
 printf(" ");
 scanf("%d",&num);
 while(num!=-1)
 {
  if(num==0||num>10||num<0)
  {
   printf("  管理员身份已注销\n");
   break;
  }
  if(num==1)
  {
  fp=fopen("student_Account.txt","a");
  information a;
  printf("   请输入账号:");
  scanf("%s",a.name);
  printf("   请输入密码:");
  scanf("%s",a.password);
  printf("  请输入专业班级:");
  scanf("%s",a.profession);
   add_student(a);
  fclose(fp);
  }
   if(num==2)
  {
  char names[10];
  printf(" 请输入要删除的账号:");
  scanf("%s",names);
  delete_student(names);

  }
   if(num==3)
   {
   fp=fopen("student_Account.txt","r");
   All_output();
   fclose(fp);
   }
  if(num==4)
   {
   fp=fopen("Thelog.txt","r");
   log_output();
   fclose(fp);
   }
   if(num==5)
   {
   char names[10];
   fp=fopen("student_Account.txt","r+");
    printf(" 请输入需要修改的账号:");
    scanf("%s",names);
    replace_massage(names);
    fclose(fp);
   }
   if(num==6)
   {
   system("cls");
   }
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/**/*/*/*\n");
 printf("   *输入1:注册学生账号   输入2:删除账号  输入3:显示所有学生信息*\n"); 
 printf("   *输入4;查看学生使用门禁情况 输入5:修改学生信息 输入6:刷新屏幕  *\n");
 printf("   */*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/*/**/*/*/*\n");
  printf(" ");
  scanf("%d",&num);
 }
}
void student_login()    //学生登录 
{
 information a;
 information b;
 fp=fopen("student_Account.txt","r");
 printf(" 请输入账号:");
 scanf("%s",a.name);
 printf(" 请输入密码:");
 scanf("%s",a.password);
 fread(&b,sizeof(struct information),1,fp);
 int i=0;
 while(feof(fp)==0)
 {
  if(strcmp(a.name,b.name)==0&&strcmp(a.password,b.password)==0)
  {
  char num[1];
  printf(" 请选择要打开几号门\n");
  printf(" ");
  scanf("%s",num);

   time();
   printf(" 亲爱的%s童鞋,你成功登陆本系统,已开启%s号门\n",a.name,num);
   i++;
  the_log(a,num);

  }
  fread(&b,sizeof(struct information),1,fp);
 }
 if(i==0)
  printf(" 登陆账号不存在或密码错误!!!若无账号请联系管理员分配账号\n");
 fclose(fp);
}
void delete_student(char names[10])  //管理员删除学生账号,解除使用门禁权限 
{ 
 FILE *p;
 information a;
 int i=0;
 fp=fopen("student_Account.txt","r");
 p=fopen("student.txt","w");
 fread(&a,sizeof(struct information),1,fp);
 while(feof(fp)==0)
 {
 if(strcmp(a.name,names)==0)
  {fread(&a,sizeof(struct information),1,fp);i=1;}
 else
  {
   fwrite(&a,sizeof(struct information),1,p);
  }
 fread(&a,sizeof(struct information),1,fp);
 } 
 if(strcmp(a.name,names)!=0)
  fwrite(&a,sizeof(struct information),1,p);
 else
  i=1;
 if(i==0)
  printf(" 账号%s不在系统中\n",names);
  else
  printf(" 账号%s已成删除\n",names);
 fclose(fp);
 fclose(p);
 remove("student_Account.txt");
 rename("student.txt","student_Account.txt");
}
void add_student(information a)  //管理员添加学生信息,分配账号,授权使用门禁系统 
{

   fseek(fp,-sizeof(struct information),1);
   fwrite(&a,sizeof(struct information),1,fp);
   printf("  添加学生%s成功!!!\n\n",a.name);


}
void time()       //显示本地时间 
{
 time_t rawtime;
 struct tm * timeinfo;

time ( &rawtime );
timeinfo = localtime (&rawtime );
printf(" %s",asctime (timeinfo));
}
void All_output()     //输出所有学生信息 
{
 int i=0;
 information a;

 fread(&a,sizeof(struct information),1,fp);
 while(feof(fp)==0)
 {
  printf("      * * * * * * * * * * * * * * * * * * * * * * *\n");
  printf("      *    学生账号:%-20s*\n",a.name);
  printf("      *    学生密码:%-20s*\n",a.password);
  printf("      *    专业班级:%-20s*\n",a.profession);
  printf("      * * * * * * * * * * * * * * * * * * * * * * *\n");
  printf("\n");
  i++;
 fread(&a,sizeof(struct information),1,fp);
 } 
 if(i==0)
 printf("    系统中无学生账号!!!\n\n");

}
void the_log(information a,char num[1])    //实时保存学生使用门禁系统情况 
{
 FILE *p;
 Thelog c;
 strcpy(c.name,a.name);
 time_t rawtime;
 struct tm * timeinfo;
 time ( &rawtime );
 timeinfo =localtime ( &rawtime );
 strcpy(c.times,asctime (timeinfo));
 strcpy(c.num,num);
 p=fopen("Thelog.txt","a");
 fwrite(&c,sizeof(struct Thelog),1,p); 
 fclose(p);
}
void log_output()        //输出学生使用门禁系统情况 
{ 
 Thelog a;

 fread(&a,sizeof(struct Thelog),1,fp);
 while(feof(fp)==0)
 {
  printf("%s",a.times);
  printf("学生%s登录了门禁系统,并开启了%s号门\n",a.name,a.num);
 fread(&a,sizeof(struct Thelog),1,fp);
 }

}
void replace_massage(char names[10])   //更改学生信息 
{
 information a;
 information b;
 fread(&a,sizeof(struct information),1,fp);
 if(strcmp(names,a.name)==0)
 {
 printf("  请输入更改后的账号:");
 scanf("%s",b.name);
 printf("  请输入修改后的密码:");
 scanf("%s",b.password);
 printf(" 请输入修改后的专业班级:");
 scanf("%s",b.profession);
 fseek(fp,-sizeof(struct information),1);//文件指针退回原结构体头 
 fwrite(&b,sizeof(struct information),1,fp);//更新联系人信息 
 printf("   信息更改成功!!!\n\n");
 }
 else if(feof(fp)==0)
  replace_massage(names);//递归调用直到找到需要更改的姓名,并完成更改 
 else
  printf("%s不在系统中!!!\n\n",names);

}

15、C语言银行管理系统(文件操作)

#include<stdio.h>    /*I/O函数*/
#include<stdlib.h>  /*其它说明*/
#include<string.h>  /*字符串函数*/
#define max 100
#define LEN 15      /* 账号和密码最大字符数,实际请更改*/
#define N 100        /* 最大账户数,实际请更改*/
int k=1,n=0, m=0;/* n代表当前记录的学生人数*/
//账户信息结构体
struct banker
{
    char accountNo[LEN];
    char accountName[LEN];
    char Password[LEN];
    float Balance;
    char VIPoNormal[LEN];
}bank[N];
void fileWrite();

//存钱
void Save()
{
    int item,i; 
    char s1[LEN+1]; //用来输账号的 
    printf("请输入需要存钱的账号\n");
    scanf("%s",&s1);
    for(i=0; i<n; i++)                  //n代表当前记录数
    {
        if(strcmp(s1,bank[i].accountNo)==0) 
        {
            item=i;
        } 
    }
    printf("请输入需要存钱的金额\n");
    float wd =0.0;
    scanf("%f",&wd); 
    bank[item].Balance+=wd;
    fileWrite(); 
    return;
} 
//查询银行账户信息
void seek()
{
    //先把账户信息读进来    必须输入该账号和对应的密码,输入错误则给出警告 
    int j=0;
    FILE * fp;
    if((fp=fopen("account.txt","r"))==NULL)
        return ;
    while(fscanf(fp,"%s %s %s %f %s\n",&bank[j].accountNo,&bank[j].accountName,&bank[j].Password,&bank[j].Balance,&bank[j].VIPoNormal)==5) 
    {
        j++;
    }
    n=j;
    int i=0,item=0,flag=0;
    char s1[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输账号的 
    char s2[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输密码的 
    printf("请输入需要查询的账号\n");
    scanf("%s",&s1);
    for(i=0; i<n; i++)                  //n代表当前记录数
    {
        if(strcmp(s1,bank[i].accountNo)==0) 
        {
            flag=1;
            item=i;
        } 
    } 
    if(0==flag)         //输入的账号和存好的账号不一致
        printf("该账号不存在!\n");
    else{
        int flag1=0;//判断密码输入是否正确 
        printf("请输入需要查询的账号对应的密码\n");
        scanf("%s",&s2);
        if(strcmp(s2,bank[item].Password)==0)
        {
            flag1=1;
        } 
        if(flag1==0){
            printf("密码输入错误\n");//这块可以改,重新输入,初步打算while循环 
            return; 
        }else{
            printf("密码输入正确\n");
            printf("您余额为:%10.1f\n",bank[item].Balance);
        }
        
    }
    return; 
    
} 


//取款模块
// vip一次最多3000 普通的2000
// 提取的钱超过余额则失败  ,用户可以选择重新输或者返回主菜单
// 取钱后进行相应的更新  

void Withdraw()
{
    //首先肯定需要查询一下 
        //先把账户信息读进来    必须输入该账号和对应的密码,输入错误则给出警告 
    int j=0;
    FILE * fp;
    if((fp=fopen("account.txt","r"))==NULL)
        return ;
    while(fscanf(fp,"%s %s %s %f %s\n",&bank[j].accountNo,&bank[j].accountName,&bank[j].Password,&bank[j].Balance,&bank[j].VIPoNormal)==5) 
    {
        j++;
    }
    n=j;
    int i=0,item=0,flag=0;
    char s1[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输账号的 
    char s2[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输密码的 
    printf("请输入账号\n");
    scanf("%s",&s1);
    for(i=0; i<n; i++)                  //n代表当前记录数
    {
        if(strcmp(s1,bank[i].accountNo)==0) 
        {
            flag=1;
            item=i;
        } 
    } 
    if(0==flag)         //输入的账号和存好的账号不一致
        printf("该账号不存在!\n");
    else{
        int flag1=0;//判断密码输入是否正确 
        printf("请输入需要查询的账号对应的密码\n");
        scanf("%s",&s2);
        if(strcmp(s2,bank[item].Password)==0)
        {
            flag1=1;
        } 
        if(flag1==0){
            printf("密码输入错误\n");//这块可以改,重新输入,初步打算while循环 
            return; 
        }else{
            printf("密码输入正确\n");
            printf("您余额为:%10.1f\n",bank[item].Balance);
            printf("请输入需要取款的金额");
            printf("您的账户类型是%s\n",bank[item].VIPoNormal);
            printf("*****注意事项:*****\n");
            printf("取款金额不能超过限额\n");
            printf("V类型用户单次取款不得超过3000元\n");
            printf("N类型用户单次取款不得超过2000元\n");
            //判断类型
            float jud=0.0;
            if(strcmp(bank[item].VIPoNormal,"V")==0) 
            {
                jud=3000;
            }
            else jud=2000;
            float wd =0.0;
            scanf("%f",&wd); 
            while(bank[item].Balance<wd || wd>jud)
            {
                printf("输入不符合规范,请按照注意事项进行输入");
                scanf("%f",&wd);
            }
            //取款之后的更新操作
            bank[item].Balance-=wd;
            fileWrite(); 
        
        }
        
    }
    
    return;
}

//转账
void Transfer()
{
        //首先肯定需要查询一下 
        //先把账户信息读进来    必须输入该账号和对应的密码,输入错误则给出警告 
    int j=0;
    FILE * fp;
    if((fp=fopen("account.txt","r"))==NULL)
        return ;
    while(fscanf(fp,"%s %s %s %f %s\n",&bank[j].accountNo,&bank[j].accountName,&bank[j].Password,&bank[j].Balance,&bank[j].VIPoNormal)==5) 
    {
        j++;
    }
    n=j;
    int i=0,item=0,flag=0;
    char s1[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输账号的 
    char s2[LEN+1]; /* 以账号和密码最长长度+1为准*/  //用来输密码的 
    printf("请输入账号\n");
    scanf("%s",&s1);
    for(i=0; i<n; i++)                  //n代表当前记录数
    {
        if(strcmp(s1,bank[i].accountNo)==0) 
        {
            flag=1;
            item=i;
        } 
    } 
    if(0==flag) 
        printf("该账号不存在!\n");
    else{
        int flag1=0;//判断密码输入是否正确 
        printf("请输入账号对应的密码\n");
        scanf("%s",&s2);
        if(strcmp(s2,bank[item].Password)==0)
        {
            flag1=1;
        } 
        if(flag1==0){
            printf("密码输入错误\n");//这块可以改,重新输入,初步打算while循环 
            return; 
        }else{
            printf("密码输入正确\n");
            printf("您余额为:%10.1f\n",bank[item].Balance);
            printf("您的账户类型是%s\n",bank[item].VIPoNormal);
            printf("请输入需要转账的账户");
            int flag2=0; 
            char s3[LEN+1];
            int item2=0;//标记目的账户 
            scanf("%s",&s3);
            for(i=0; i<n; i++)                 
            {
                if(strcmp(s3,bank[i].accountNo)==0) 
                {
                    flag2=1;
                    item2=i;
                } 
            }
            while(flag2==0){
                printf("账户输入有误请重新输入");
                scanf("%s",&s3);
                for(i=0; i<n; i++)                 
                {
                    if(strcmp(s3,bank[i].accountNo)==0) 
                    {
                        flag2=1;
                        item2=i;
                        printf("accountNo    accountName  Password   Balance  VIPoNormal  \n");
                        printf("--------------------------------------------------------------------\n");
                        printf("%s %16s %10s %10.1f  %s\n",bank[i].accountNo,bank[i].accountName,bank[i].Password,bank[i].Balance,bank[i].VIPoNormal);
                    } 
                }
            }
    
            printf("*****注意事项:*****\n");
            printf("转账金额不能超过限额\n");
            printf("V类型用户单次转账不得超过20000元\n");
            printf("N类型用户单次转账不得超过10000元\n");
            printf("请输入需要转账的金额\n");
            float jud=0.0;
            if(strcmp(bank[item].VIPoNormal,"V")==0) 
            {
                jud=20000;
            }
            else jud=10000;
            float money;
            scanf("%f",&money);
            while(money>jud || money>bank[item].Balance)
            {
                printf("输入不符合规范,请按照注意事项进行输入");
                scanf("%f",&money);
            }
            if(strcmp(bank[item].VIPoNormal,"V")==0) 
            {
                bank[item].Balance-=money*0.005; 
            }else{
                bank[item].Balance-=money*0.01; 
            }
            bank[item].Balance-=money;
            bank[item2].Balance+=money; 
            fileWrite();
            printf("转账成功\n");
        }
        
    }
    
    return;
} 

//插入学生信息函数
void insert() 
{
    int i;
    printf("请输入待增加的账户数:");
    scanf("%d",&n);
    FILE * fp;
    if((fp=fopen("account.txt","at"))==NULL) 
        printf("文件为空!\n");
    for(i=0; i<n; i++) 
    {
        printf("\n请输入第%d个账户的账号:",i+1);
        scanf("\n%s",&bank[i].accountNo);
        printf("\n请输入第%d个账户的姓名:",i+1);
        scanf("%s",&bank[i].accountName);
        printf("\n请输入第%d个账户的密码:",i+1);
        scanf("%s",&bank[i].Password);
        printf("\n请输入第%d个账户的余额:",i+1);
        scanf("%f",&bank[i].Balance);
        printf("\n请输入第%d个账户的类别:",i+1);
        scanf("%s",&bank[i].VIPoNormal);
//        sort();   //调用按学号排序函数
        //写入文件
        fprintf(fp,"%s %16s %10s %10.1f  %s\n",&bank[i].accountNo,&bank[i].accountName,&bank[i].Password,&bank[i].Balance,&bank[i].VIPoNormal);
    }
    printf("\n添加成功!!!\n");

    fclose(fp);
}


//显示当前信息
void display() 
{
    int i=0;
    FILE * fp;
    if((fp=fopen("account.txt","r"))==NULL)
        printf("文件为空!\n");
    while(fscanf(fp,"%s %s %s %f %s\n",&bank[i].accountNo,&bank[i].accountName,&bank[i].Password,&bank[i].Balance,&bank[i].VIPoNormal)==5) 
    {
        i++;
    }
    n=i;               //记录文件中数据的行数
    printf("accountNo    accountName  Password   Balance  VIPoNormal  \n");
    printf("--------------------------------------------------------------------\n");
    for(i=0;i<n;i++)    //依次输出学生信息
    {
        printf("%s %16s %10s %10.1f  %s\n",bank[i].accountNo,bank[i].accountName,bank[i].Password,bank[i].Balance,bank[i].VIPoNormal);
    }
     fclose(fp);
}


//保存当前账户信息
void fileWrite()
{
        FILE *fp;
        int i;
        if((fp=fopen("account.txt","w"))==NULL) 
            printf("文件为空!\n");
        for(i=0; i<n; i++) 
        {
            fprintf(fp,"%s %16s %10s %10.1f  %s\n",bank[i].accountNo,bank[i].accountName,bank[i].Password,bank[i].Balance,bank[i].VIPoNormal);
        }
        fclose(fp);
        printf("保存成功!!!");
} 


//界面
void menu() 
{
    int num;
    printf(" \n\n                    \n\n");
    printf(" * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n");
    printf(" *                   银行管理系统                    *\n");
    printf(" *                                                       *\n");
    printf(" *       * * * * * * *系统功能菜单* * * * * * *          *\n");
    printf(" *    --------------------------------------------       *\n");
    printf(" *    1. 查询账户信息   *\n");
    printf(" *    2. 存钱           *\n");
    printf(" *    3. 取款           *\n");
    printf(" *    4. 转账           *\n");
    printf(" *    5. 退出系统       *\n");

    printf(" * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n");
    printf("- - - - - - - - - - - - - - - - - - - - - - - - - - - - - \n");
    printf("请选择菜单编号:");
    scanf("%d",&num);
    switch(num) {
        case 0:
//            help();
            break;
        case 1:
            seek();
            break;
        case 2:
            Save();
            break;
        case 3:
            Withdraw();
            break;
        case 4:
            Transfer();
            break;
        case 5:
           k=0;
            break;
        default:
            printf("请在0-8之间选择\n");
    }
}


//主函数    
int main() 
{
    while(k) 
    {
        menu();
    }
    system("pause");
    return 0;
}

C语言期末作业15个(上)

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