这里一个有限状态机的例子，适合学习用，里面有三个程序，都是不同的程序，也有一个Common的文件，在VC++平如下运行时要导入这个文件，否刚系统编译找不到头文件而报-Here a finite state machine of example, suitable for learning to use, inside there are three procedures are different procedures, but also have a Common s file, VC++ l