#include<stdio.h>
#include <sys/types.h>
#include<unistd.h>
int main()
{
        pid_t pid;
        int data = 10;
        while(1)
        {
                printf("please input a data:");
                scanf("%d",&data);
                if (data == 1)
                {
                        pid = fork();
                        if (pid>0)
                        {

                        }
                        else if (pid == 0)
                        {
                                while(1)
                                {
                                        printf("\ndo net request,pid=%d\n",getpid());
                                        sleep(3);
                                }
                        }
                }
                else
                {
                        printf("wati,do nothing\n");
                }
        }
}