C++重载“＜＜”，“＞＞”运算符与友元函数

#include <iostream>
using namespace std;

class Person {
	private:
		string name;
		int age;
		
	public:
		Person(string name, int age) {
			this->name = name; 
			this->age = age;
		}
		~Person() {
			cout<<"\nThe object of "<<name<<" has been deleted!";
		}
		
		//将<<运算符定义为Person类的友元函数后，
        //编译系统自动将cout<<p解释为operator<<(cout, p) 
		friend ostream& operator<<(ostream& output, Person& p) {
			output<<"Name："<<p.name<<"\tAge："<<p.age;
            return output;
		}
};

int main(int argc, char** argv) {
    Person p("大明", 22);
    cout<<p<<endl;
    return 0;
}