#include <iostream>
using namespace std;

class A{
	public:
	virtual void foo(){
		cout << "Hallo A\n";
	}
	
	virtual void bar(){
		cout << "Bar A\n";
	}
	
};

class B : A{
	public:
	virtual void foo(){
		cout << "Hallo B\n";
	}
};

typedef void (*foo_ptr)();

int main() {
	// your code goes here
	B a;
	//a.foo();
	void** ref = *(void***)&a;//vtable
	((foo_ptr)ref[1])();
	
	return 0;
}