This is a human

代码说明：

这是一个人机对战游戏，字符界面，入门级别。每次可取1-4根，取最后一根者为输。本程序的算法很简单，但谁都是从基础起步的。 -This is a human-computer game players, a character interface, the entry-level. Each root desirable 1-4, the last one who admitted to lose. This procedure is very simple algorithm, but who are starting from the foundation.