左移运算符重载

约 25 个字 33 行代码

Note

重载左移运算符配合友元可以实现输出自定义数据类型

#include <iostream>
using namespace std;
class Person {
    friend ostream & operator<<(ostream& out, Person & p);
public :
    Person(int a,int b){
        this->a = a;
        this->b = b;
    }

private:
    int a,b;
};

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

void test(){
    Person p1(10,20);
    cout << p1 << "hello world" << endl; // 链式编程

}

int main(){
    test();


    return 0;
}

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