将本章11.8节中的程序片断加以补充完善。

将本章11.8节中的程序片断加以补充完善。在程序中使用继承和组合。在

定义Professor类对象prof1时给出全部数据的初值，而后修改profl的生日数据，最后

输出profl的所有最新数据

 

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

class Teacher
{
public:
    Teacher(int n,string name,string s):num(n),name(name),sex(s){}
    void display()
    {
        cout<<"num:"<<num<<endl;
        cout<<"name:"<<name<<endl;
        cout<<"sex:"<<sex<<endl;
    }
private:
    int num;
    string name;
    string sex;
};

class BirthDate
{
public:
    BirthDate(int y,int m,int d):year(y),month(m),day(d){}
    void change(int y,int m,int d)
    {
        year=y;
        month=m;
        day=d;
    }
    void display()
    {
        cout<<year<<"/"<<month<<"/"<<day<<endl;
    }
private:
    int year;
    int month;
    int day;
};
class Professor:public Teacher
{
public:
    Professor(int n,string name,string s,int y,int m,int d):Teacher(n,name,s), birthday(y,m,d){}
    void change(int y,int m,int d)
    {
        birthday.change(y,m,d);
    }

    void display()
    {
        Teacher::display();
         birthday .display();
    }
private:
    BirthDate birthday;
};
int main()
{
    Professor p1(101,"李四","男",1992,3,13);
    p1.change(1990,4,7);
    p1.display();

}