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