这是一个基于c++的游戏设计。是一个家喻户晓的21点扑克牌游戏，玩家把系统随机给出的牌点通过四则运算组成21，系统根据程序判断玩家输赢。-This is a c++ based game design. Is a well-known blackjack, card points gives players the system randomly composed of 21 through four operations, the system according to the procedure to determine the players win or lose.