可以实现完成猜测21点，如纸牌游戏一样，可以分别猜测黑桃，梅花，方块，红桃，实现人机对战，机器为随机为人为发牌-Completion of 21 points can guess, such as card games, you can guess, respectively, spades, clubs, squares, hearts and realize man-machine battle, man-made machines for the licensing of a random