// 置换主牌
public bool exchageMasterCard(ref Card changer)
{
if (masterCard == null) { return false; }
Card exc = masterCard;
masterCard = changer;
changer = exc;
return true;
}
// 取出一张牌
public Card getCard()
{
if (this.count() == 0) { return null; }
Card myref = masterCard;
if (heapList.Count == 0)
{
masterCard = null;
return myref;
}
myref = heapList[0];
heapList.RemoveAt(0);
return myref;
}