Refinement in C++

// place a single card into a card pile
void CardPile::addCard(Card * aCard)
{
	if (aCard != nilcard) {
		aCard->setLink(top);
		top = aCard;
		top->moveTo(x, y);
		}
}

// place a single card into a table pile
void TablePile::addCard(Card * aCard)
{	int tx, ty;

	// pile is empty, just place it normally
	if (top == nilcard)
		CardPile::addCard(aCard);
	else {	// display it below other cards
		tx = top->locx();
		ty = top->locy();
		// figure out where to place card
		if (top->faceUp() && top->next() != nilcard &&
			(top->next())->faceUp())
				; // do nothing
		else
			ty += 30;	// move down a bit
		CardPile::addCard(aCard);
		top->moveTo(tx, ty);
		}
}

Intro OOP, Chapter 11, Slide 17