本文的重点就在于，怎样利用状态机原理进行程序设计。本文会先给出普通

的、一个平面上的FSM（有限状态机）的概念和实例，并指出其中的一些缺点，

然后引出本文的重点HSM（层次状态机）的概念和设计方法。为了使本文既可以

作为设计方法的参考，又可以作为实现方法的参考，本文会给出FSM和HSM的

C语言实现-The focus of this article is that, and how to make use of the principle of the state machine programming. This article will be given the ordinary concept of FSM (finite state machine) on a plane and instances, and pointed out some shortcomings, and then leads to the concept and design of the focus of this article HSM (hierarchical state machine). In order to make this both design methods can be used as a reference, and can be used as a reference method, this article will give the C language implementation of the FSM and HSM