LexicalAnalysis

代码说明：

  用C++编写的一个简单C语言词法分析器，把需要分析的内容保存在C:input.txt，分 析完毕好保存在C:output.txt(Using C++ to prepare a simple C language lexical analyzer, the need to analyze the contents stored in C: input.txt, finished the analysis of well preserved in the C: output.txt)