一.+号运算符重载

//
//  main.c
//  cdemo
//
//  Created by liyongkai on 2021/6/6.
//

#include <iostream>
using namespace std;

class Person{
public:
    int a;
    int b;
    Person(){};
    Person(int a, int b):a(a), b(b) {
    };
    
    //+号运算符重载
    Person operator+(Person &p) {
        Person temp;
        temp.a = this->a + p.a;
        temp.b = this->b + p.b;
        return temp;
    };
};


int main(int argc, const char * argv[]) {
    
    Person p1 = Person(1,2);
    Person p2(10, 10);
    
    Person p3 = p1 + p2;
    cout << "a:" << p3.a << "   " << "b:" << p3.b << endl;
    //a:11   b:12

    return 0;
}

二.<<号运算符重载

//
//  main.c
//  cdemo
//
//  Created by liyongkai on 2021/6/6.
//

#include <iostream>
using namespace std;

class Person{
public:
    int a;
    int b;
};

ostream& operator<<(ostream &cout, Person &p) {
    cout << "a:" << p.a;
    return cout;
}

int main(int argc, const char * argv[]) {
    
    Person p1;
    p1.a = 10;
    cout << p1 << endl;//a:10

    return 0;
}

三.指针运算符重载（智能指针）