#include <iostream>
using namespace std;

class Person
{
private:
    int age;
    int *p;
public:
    //无参构造
    Person():p(new int(89))
    {
        age = 18;
        cout << "无参构造函数" <<endl;
    }
    //有参构造
    Person(int age,int num)
    {
        this->age = age;
        this->p=new int(num);
        cout << "有参构造函数" <<endl;
    }
    //拷贝构造函数

    Person(Person &other)
    {
    this->age=other.age;
    this->p=new int(*other.p);
       cout << "拷贝构造函数" << endl;
    }

    //拷贝赋值函数
    Person &operator=(const Person &other)
    {
        if(this!=&other)
        {
         age=other.age;
         p=new int(*other.p);
        }
        cout << "拷贝赋值函数" << endl;
        return *this;
    }

        //析构函数
    ~Person()
    {
        cout << "释放了" << p << "所指向的空间" <<endl;
        delete p;
        p=nullptr;
        //cout << "释放了p所指向的空间" <<endl;
    }
    };

    int main()
    {
        Person P0;
        Person P1(100,51);
        Person P2=P1;

        return 0;
    }