加号运算符重载

1、成员函数重载+号

#include<iostream>
	
using namespace std;

class Person
{
public:
	//1、成员函数重载+号
	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;	
}; 

void test01()
{
	Person p1;
	p1.m_A=10;
	p1.m_B=10;
	Person p2;
	p2.m_A=10;
	p2.m_B=10;
	Person p3=p1+p2;
	cout<<"p3.m_A= "<<p3.m_A<<endl;
	cout<<"p3.m_B= "<<p3.m_B<<endl;
}
int main()
{
    test01();
    return 0;
}

2、全局函数重载+号

#include<iostream>
	
using namespace std;

class Person
{
public:
	
	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;
} 
void test01()
{
	Person p1;
	p1.m_A=10;
	p1.m_B=10;
	Person p2;
	p2.m_A=10;
	p2.m_B=10;
	Person p3=p1+p2;
	cout<<"p3.m_A= "<<p3.m_A<<endl;
	cout<<"p3.m_B= "<<p3.m_B<<endl;
}
int main()
{
    test01();
    return 0;
}

3、运算符重载，也可以发生函数重载

#include<iostream>
	
using namespace std;

class Person
{
public:
	
	int m_A;
	int m_B;	
}; 
//2、全局函数重载+号
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=10;
	
	Person p3=p1+20;
	cout<<"p3.m_A= "<<p3.m_A<<endl;
	cout<<"p3.m_B= "<<p3.m_B<<endl;
}
int main()
{
    test01();
    return 0;
}