C++类的构造函数、析构函数

一道题看完你就懂了***《看代码注释即可》***

直接上题目：


代码：

#include<iostream>
#include<stdlib.h>

using namespace std;


class Cat
{
    
    
	int data;
public:
	Cat()
	{
    
    
		data =0;
		cout << "Default Constructor of Cat is Running"<<endl;
	}
	Cat(int x)
	{
    
    
		data = x;
		cout << "Constructor of Cat is Running " << x<<endl;
	}

	~Cat()
	{
    
    
		cout << "Destructor of Cat is Running " << data << endl;
	}
};


class Tiger : public Cat
{
    
    
	int data;
public:
	//子类继承会默认调用父类的无参构造函数，
	//所以这里显示调用父类的有参构造
	Tiger(int x): Cat(x)
	{
    
    
		data = x;
		cout << "Constructor of Tiger is Running " << x << endl;
	}

	~Tiger()
	{
    
    
		cout << "Destructor of Tiger is Running " << data << endl;
	}

};

int main()
{
    
    
	Cat bc;
	Tiger dc(6);
	Tiger dc1(18);


	
	return 0;
}