C++ //运算符重载 +号

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

//1.成员函数重载 +号
class Person
{
public:

    //Person operator+(Person& p)
    //{
    //    Person temp;
    //    temp.m_A = this->m_A + p.m_A;
    //    temp.m_B = this->m_B + p.m_B;
    //    return temp;
    //}
    int m_A;
    int m_B;
};

//2.全局函数重载 +号
Person operator+(Person& p1, Person& p2)
{
    Person temp;
    temp.m_A = p1.m_A + p2.m_A;
    temp.m_B = p1.m_B + p2.m_B;

    return temp;
}
//函数重载
Person operator+(Person& p1, int num)
{
    Person temp;
    temp.m_A = p1.m_A + num;
    temp.m_B = p1.m_B + num;

    return temp;

}

void test01()
{
    Person p1;

    p1.m_A = 10;
    p1.m_B = 20;

    Person p2;

    p2.m_A = 10;
    p2.m_B = 20;
    //成员函数重载本质调用
    //Person p3 = p1.operator+(p2);
    //成员简化
    //Person p3 = p1 + p2;

    //全局函数.

    Person p3 = operator+(p1, p2);
    //全局函数简化
    //Person p3 = p1 + p2;

    //运算符重载也可以发生函数重载
    Person p4 = p1 + 100;   //Person  +int

    cout << "p3 .m_A = " << p3.m_A << endl;

    cout << "p3 .m_B = " << p3.m_B << endl;


    cout << "p4 .m_A = " << p4.m_A << endl;
    cout << "p4 .m_B = " << p4.m_B << endl;

}


int main()
{
    test01();
}