C / C++ / MFC

class A
{
public:
virtual ~A() {...whatver...}
};
class B : public A
{
public:
~B() {...whatver...}
};

#include <conio.h>
#include <iostream>
using std::cout;
using std::endl;

class A
{
public:
	A ()
	{
	}

	~A()
	{
		cout << "delete A" << endl;
	}
};

class B : public A
{
public:
	B () : A()
	{
	}

	~B()
	{
		cout << "delete B" << endl;
	}
};

int main(int argc, char* argv[])
{
		//C: Allocate a delete an object of type B from a type B pointer.
	B* B_Pointer = new B;
	delete B_Pointer;
		//C: Allocate a delete an object of type A, 
		//   polymorphically from a type A pointer.
	A* A_Pointer = new B;
	delete A_Pointer;

	cout << "Press any key to exit" << endl;
	::getch();
	return 0;
}

delete B
delete A
delete A
Press any key to exit

delete B
delete A
delete B
delete A
Press any key to exit