虚析构函数

最新推荐文章于 2025-06-29 22:29:39 发布

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#include <iostream.h>

class Base{
public:
	virtual ~Base(){  //如果不声明为虚析构函数，则只能析构基类，派生类不能析构，造成内存泄露
		cout<<"Base destructor\n";
	}
};
class Derived:public Base{
public:
	Derived();
	~Derived();
private:
	int *i_pointer;
};

Derived::Derived(){
	i_pointer=new int(0);
}

Derived::~Derived(){
	cout<<"Derived destructor\n";
	delete i_pointer;
}

void fun(Base *b){
	delete b;
}

int main(){
	Base *b=new Derived();
	fun(b);
}