C++ 自定义类型属性的拷贝过程

#include <iostream>

#include <string>

using namespace std;

class P {

   public:

    int id;

    string name;

   public:

    P() { cout << "wu can p gou zao " << endl; }

    P(int id, string name) { cout << "you can p gou zao" << endl; }

    P(const P &p) { cout << "p de 拷贝构造函数" << endl; }

};

class Person {

   public:

    int id2 = 202;

    int id1 = 201;

    P p;

   public:

    Person() { cout << "person gou zao " << endl; }

};

int main(int argc, char const *argv[]) {

    Person p1;

    // 默认情况下，会调用自定义类型属性的拷贝构造函数

    Person p2 = p1;

    return 0;

}