２４点小游戏，可调整难度级别，游戏采取限时积分模式，另外添加了自定义游戏的功能，用户输入四个数，系统给出所有的答案-24 small game, adjustable difficulty levels, games take SPECIAL integral model Also added to the game since the definition of functions, user input number four, the system gives all the answer