9-加号运算符重载

#include<bits/stdc++.h>
using namespace std;
//加号运算符重载
//1、通过成员函数重载 
//2、通过全局函数重载
class Person{
  public:
    //1、通过成员函数重载 
//    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、通过全局函数重载
  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;
  } 
//运算符重载
Person operator+(Person p,int num){
  Person temp;
  temp.m_A=p.m_A+num;
  temp.m_B=p.m_B+num;
  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;
  //成员函数的本质调用
  //Person p3=p1.operator+(p2); 
  Person p3=p1+p2;
  //全局函数的本质调用
  //Person p3= operator+(p1,p2)
  cout<<"p3.m_A= "<<p3.m_A<<endl;
  cout<<"p3.m_B= "<<p3.m_B<<endl;
  //运算符重载 也可以发生函数重载
  Person p4=p1+100;
  cout<<"p4.m_A= "<<p4.m_A<<endl;
  cout<<"p4.m_B= "<<p4.m_B<<endl;
}
int main()
{
//运算符重载
//运算符重载概念：对已有的运算符重新进行定义，赋予其另一种功能，以适应不同的数据类型 
  test01();
  return 0;
 }