people为基类，student和graduate为子类，重载“＝＝”运算符
//people为基类，student和graduate为子类，重载“＝＝”运算符
//输入2个学生的信息：姓名、编号、身份证号、班级、专业
//输入1个研究生的信息：姓名、编号、身份证号、班级、专业、导师
//重载“＝＝”，当两个学生的编号相同时，调用重载运算符，输出错误信息
源代码如下：
#include <iostream>
#include <string>
using namespace std;
//定义基类
class People
{
public:
//成员变量：姓名，编号，身份证号
string name;
string number;
string id_number;
public:
People() {} //无参数的构造函数
People(string name1,string number1,string id_number1){
name = name1;
number = number1;
id_number = id_number1;
}
//声明input,,output,类外定义
void input();
void output();
};
//定义基类的成员函数input()
void People:: input()
{
//输入姓名，编号，身份证号
cin >> name;
cin >> number;
cin >> id_number;
}
//定义基类的成员函数output()
void People:: output()
{
//输出姓名，编号，身份证号
cout << " name : " << name;
cout << " number : " << number;
cout << " id_number : " << id_number;
}
//子类student
class Student:public People
{
//成员变量班级，专业
public:
string Class;
string major;
public:
Student(){}
Student(string name1,string number1,string id_number1,string Class1,string major1):People(name1,number1,id_number1){
Class = Class1;
major = major1;
}
void input();
void output();
bool operator ==(const Student &);
};
//子类的成员函数中，调用基类的成员函数input()
void Student::input()
{
People::input();
//输入班级专业
cin>>Class>>major;
}
void Student::output()
{
People::output();
//输出班级专业
cout << " Class : "<< Class;
cout << " major : "<< major<<endl;
}
//运算符“＝＝”重载
bool Student::operator ==(const Student &s)
{
if(number ==s.number)
{
cout<<"两个学生编号相同，不合法！";
exit(1);
}
else
{
return 1;
}
}
//子类Graduate(研究生)
class Graduate:public Student
{
public:
string daoshi;
public:
Graduate(){}
Graduate(string name1,string number1,string id_number1,string Class1,string major1,string daoshi1):Student(name1,number1,id_number1,Class1,major1)
{
daoshi = daoshi1;
}
void input();
void output();
};
void Graduate::input()
{
Student::input();
cin >>daoshi;
}
void Graduate::output()
{
Student::output();
cout<<" daoshi : "<<daoshi<<endl;
}
int main()
{
Student s1;
Student s2;
Graduate g;
cout<<" please input the student info : "<<endl;
s1.input();
cout<<" please input the student info : "<<endl;
s2.input();
s1==s2; //调用“＝＝”重载,判断两个学生的编号是否相同
cout<<" please input the graduate info: "<<endl;
g.input();
cout<<" please show the students info:"<<endl;
s1.output();
s2.output();
cout<<" show the graduate info: "<<endl;
g.output();
return 1;
}
运行结果：
