说明：  本次课程设计主要是做一个猜数字游戏，要求随机提供序列类型，并且可以按要求提供该序列的前n项，要求猜测第n+1项。这样的n可以作为游戏的难度，n越小，则难度越大；n越小，难度越小。本猜字游戏的难度分为3个级别： 1、简单 2、中等 3、困难
(The curriculum design is mainly a game猜数字requested to provide a random sequence types, and can be provided on request prior to the sequence of n items, the requirements guess the first n+ 1 item. N such as the difficulty of the game, n the smaller, the greater the degree of difficulty n smaller, the smaller the degree of difficulty. This game is more difficult to guess the word is divided into three levels: 1, simple 2, medium 3, the difficulties)