C++/重载关系运算符（5）

情景：

int a = 10;
int b = 10;

if(a==b)
{
    cout<<"a和b相等"<<endl;
}

Person p1;
person p2;

if(p1==p2)　　//非内置数据类型关系运算符，编译器无法识别，须重载关系运算符
{
    cout<<"a和b相等"<<endl;    
}

if(p1!=p2)
{
    cout<<"a和b不相等"<<endl;    
}

重载关系运算符：

#include <iostream>
using namespace std;

class Person 
{
public:
    //有参构造函数
    Person(string name, int age)
    {
        m_Name = name;
        m_Age = age;
    }

    //重载==号
    bool operator==(Person &p)
    {
        if (this->m_Name == p.m_Name && this->m_Age == p.m_Age)//关键
        {
            return true;
        }
        return false;
    }

    //重载！=号
    bool operator!=(Person &p)
    {
        if (this->m_Name == p.m_Name && this->m_Age == p.m_Age)//关键
        {
            return false;
        }
        return true;
    }

    string m_Name;
    int m_Age;

};

void test_01(void)
{
    Person p1("Tom",18);
    Person p2("Jerry", 18);

    if (p1 == p2)
    {
        cout << "a和b相等" << endl;
    }
    else
    {
        cout << "a和b不相等" << endl;
    }

    if (p1 != p2)
    {
        cout << "a和b不相等" << endl;
    }
    else
    {
        cout << "a和b相等" << endl;
    }

}

int main(void)
{
    test_01();

    system("pause");
    return 0;
}