The Discard Pile

public class DiscardPile : CardPile {
	public DiscardPile (int x, int y ) : base(x, y) { }

	public override void addCard (PlayingCard aCard) {
		if( ! aCard.isFaceUp )
			{ aCard.flip(); }
		base.addCard( aCard );
	}

	public override void select (int tx, int ty) {
		if( isEmpty ) { return; }
		PlayingCard topCard = pop;
		for( int i = 0; i < 4; i++ ) {
			if( Game.suitPile(i).canTake( topCard ) ) {
				Game.suitPile(i).addCard( topCard );
				return;
			}
		}

		for( int i = 0; i < 7; i++ ) {
			if( Game.tableau(i).canTake( topCard ) ) {
				Game.tableau(i).addCard( topCard );
				return;
			}
		}
		// nobody can use it, put it back on our stack
		addCard(topCard);
	}
}