Inheritance

struct  A{
	int get(){ return 1; }
};
struct B : public A{
	int get(){ return 2; }
};
struct D {
	int get(){ return 3; }
};
struct C : public B, public D{
	int get(){ return 4; }
};

int main(){
	C c;
	int 
	i =	 dynamic_cast<A*>(&c)->get();
	i += dynamic_cast<B*>(&c)->get();
	i += dynamic_cast<D*>(&c)->get();
	i += dynamic_cast<C*>(&c)->get();
	return i;
}