重载输入输出运算符

一、实验目的：

    1、在实验2的基础上，在类Person中，以友元形式重载输入输出运算符〈〈、〉〉；

2、通过“cout<<teach”或“cout<<stud”，调用右值类的虚函数Display()，显示右值对象的信息。

3、通过“cin>>teach”或“cin>>stud”，调用右值类的虚函数SetValue()，通过键盘输入右值对象的信息。

 

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

class TDate{
protected:
    int Year,Month,Day;

public:
    TDate()
    {
    }
    TDate(int year,int month,int day){
        Year=year;
    Month=month;
    Day=day;
    }

};

class Person:public TDate{
protected:
    int ID;
    static int Count;
    string Name,Sex;
public:
    Person()
    {

    }
    Person(int id,string name,string sex,int year,int month,int day):TDate(year,month,day)
    {
        //ID=id;
        Name=name;
        Sex=sex;
    }
    virtual void Display()
    {
        cout<<"姓名："<<Name<<endl;
        cout<<"性别："<<Sex<<endl;
    }
};
int Person::Count=0;

class Teacher:public Person{
protected:
    string Title;
    string Dept;
public:
    Teacher(){
        Count++;
        ID=Count;
    }
    Teacher(string title,string dept,int id,string name,string sex,int year,int month,int day):Person(id,name,sex,year,month,day)
    {
         Count++;
        ID=Count;
        Title=title;
        Dept=dept;
    }
    virtual void Display()
    {
        cout<<"-----老师信息-----"<<endl;
        cout<<"编号:"<<ID<<endl;
        cout<<"姓名："<<Name<<endl;
        cout<<"性别："<<Sex<<endl;
        cout<<"出生日期："<<Year<<"年"<<Month<<"月"<<Day<<"日"<<endl;
        cout<<"职称："<<Title<<endl;
        cout<<"所在系："<<Dept<<endl;
    }
 friend ostream &operator<<(ostream &out,Teacher &ob)
    {
        ob.Display();
        out<<endl;
        return out;
    }
};
class Student:public Person{
protected:
    string Major,Grade;
public:
Student()
    {
        Count++;
        ID=Count;
    }
    Student(int id,string name,string sex,int year,int month,int day,string major,string grade):Person(id,name,sex,year,month,day)
    {
        Count++;
        ID=Count;
        Major=major;
        Grade=grade;
    }
    virtual void Display()
    {
        cout<<"----------学生信息----------"<<endl;
        cout<<"编号："<<ID<<endl;
        cout<<"姓名："<<Name<<endl;
        cout<<"性别："<<Sex<<endl;
        cout<<"出生日期："<<Year<<"年"<<Month<<"月"<<Day<<"日"<<endl;
        cout<<"专业："<<Major<<endl;
        cout<<"年级："<<Grade<<endl;
    }
    virtual void SetValue()
    {
        cout<<"姓名：";
        cin>>Name;
        cout<<"性别：";
        cin>>Sex;
        cout<<"出生年份：";
        cin>>Year;
        cout<<"出生月份：";
        cin>>Month;
        cout<<"出生日期：";
        cin>>Day;
        cout<<"年级：";
        cin>>Grade;
        cout<<"专业：";
        cin>>Major;
        cout<<endl;
    }
    friend ostream &operator<<(ostream &out,Student &ob)
    {
        ob.Display();
        out<<endl;
        return out;
    }
    friend istream &operator>>(istream &in,Student &ob)
    {
        ob.SetValue();
        return in;
    }
};
int main()
{
    Teacher teach("讲师","计算机系",1,"张山","男",1978,11,11);
    Student stud;
    cout<<"------------请输入学生信息---------------"<<endl;
    cin>>stud;
    cout<<teach;
    cout<<stud;
    int i;
    cin>>i;
    return 0;
}