class A // An interface
{
public:
	virtual ~A();

	virtual void whatever_A()=0;
};

class B // Another interface
{
public:
	virtual ~B();

	virtual void whatever_B()=0;
};

class C: public A, public B
{
public:
	C();
	virtual ~C();

	virtual void whatever_A();
	virtual void whatever_B();
};