/// <summary>
/// 电脑玩家出牌
/// </summary>
/// <param name="prevCardSet">上一手牌</param>
/// <returns>出牌结果</returns>
public CardSet PlayCard(CardSet prevCardSet)
{
//直接用提示功能
//不会写AI，所以直接打能打过的较小的牌
return(cardHand.GetCardSetGreater(prevCardSet));
}