一个由LEX编写的C

代码说明：

一个由LEX编写的C-词法分析程序。为锻炼使用者能力，未加载LEX已编译的代码。建立时最好建立控制台程序。-LEX written by a C-lexical analysis program. The user the ability to exercise without load LEX compiled code. Is best to establish procedures for the establishment of the console.