定义一个Teacher(教师)类和一个 Student( 学生)类，者有一部分数据成员 是相同的，例如num(号码)， name(姓名)，sex(性别)。编写程序,将一个Student对象(学生)转换为Teacher(教师)类，只将以上3个相同的数据成员移植过去。可以设想为:一位学生大学毕业了,留校担任教师,他原有的部分数据对现在的教师身份来说仍然是有用的，应当保留并成为其教师数据

#include<iostream>
#include<string.h>
using namespace std;

class Student{
public:
	Student(int,string,char,float);
	int getNum(){return num;}
	string getName(){return name;}
	char getSex(){return sex;}
	float getScore(){return score;}
	void display();
private:
	int num;
	string name;
	char sex;
	float score;
};

Student::Student(int num,string name,char sex,float score){
	this->num=num;
	this->name=name;
	this->sex=sex;
	this->score=score;
}

void Student::display(){
	cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<score<<endl;
}


class Teacher{
public:
	Teacher(){}
	Teacher(Student &);
	Teacher(int,string,char,float);
	void display();
private:
	int num;
	string name;
	char sex;
	float pay;
};

void Teacher::display(){
	cout<<"num:"<<num<<"\nname:"<<name<<"\nsex:"<<sex<<"\nscore:"<<pay<<endl;
}

Teacher::Teacher(int num,string name,char sex,float pay){
	this->num=num;
	this->name=name;
	this->sex=sex;
	this->pay=pay;
}

Teacher::Teacher(Student &student){
	this->num=student.getNum();
	this->name=student.getName();
	this->sex=student.getSex();
	this->pay=1500;
}

int main(){
	Student student1(1111,"Wang",'m',99);
	Teacher teacher1(1001,"Li",'f',1234.5),teacher2;

	cout<<"teacher1=\n";
	teacher1.display();

	cout<<endl;
	cout<<"student1=\n";
	student1.display();

	cout<<endl;
	teacher2=Teacher(student1);
	cout<<"teacher2=\n";
	teacher2.display();

	return 0;
}

一部分。