#include <iostream.h>
class A{
public:
	virtual void v(){cout << "A::v\n";}
	        void n(){cout << "A::n\n";}
};
class B: public A{
public:
	virtual void v(){cout << "B::v\n";}
	        void n(){cout << "B::n\n";}
};
class C: public A{
public:
	virtual void v(){cout << "C::v\n";}
	        void n(){cout << "C::n\n";}
};
 
int main()
{
	A a; B b; C c;
	a.v();
	a.n();
	b.v();
	b.n();
	c.v();
	c.v();
	 
	A  *apa=&a,  *apb=&b, *apc=&c;
	apa->v();
	apa->n();
	apb->v();
	apb->n();
	apc->v();
	apc->n();
	return 0;
}