虚析构函数

#include <iostream>

#include <string>

using namespace std;

class Base{

public:

virtual ~Base(){cout<<"Base destrutor"<<endl;} ///虚析构函数

/*再添加virtual的情况下，

Base* q = new Deriv();

delete q;

如基类指针指向派生类，那么删除基类指针的时候将调用派生类指针和基类指针。

*/

};

class Deriv: public Base{

public:

~Deriv(){cout<<"Deriv destrutor"<<endl;}

};

class C: public Deriv{

~C(){ cout<<"C destrutor"<<endl;}

};

int main()

{

Base* p = new Base();

delete p;

Base* q = new Deriv();

delete q;

Deriv* t = new C();

delete t;

}