析构函数调用次数

#include <iostream>
using namespace std;
class A{
public:
    A(){cout<<"class A construtor"<<endl;}
    ~A(){cout<<"class A destrutor"<<endl;}
    void fun1(){cout<<"fun1()"<<endl;}
};

int main()
{
    A a;
    A a2=a;
    return 0;
}

运行结果：

class A construtor
class A destrutor
class A destrutor

共调用2次析构函数，析构函数次数=构造函数次数+拷贝构造函数次数