has virtual functions but non-virtual destructor

 

#include <iostream>
using namespace std;
class based{
public:
	based(){
	}
	~based(){
		 cout<<"flag 1"<<endl;
	}
	virtual void f(){
		cout<<"ok1"<<endl;
	}
};
class derived:public based{

public:
	~derived(){
		cout<<"flag 2"<<endl;
	}
	void f(){
		cout<<"ok2"<<endl;
	}
};
int main(){
based* p = new derived();
p->f();
delete p;
	
}

 

输出结果：

ok2

flag 1

 

指向基类的指针，delete p;只调用基类的析构函数，没有调用派生类的析构函数。