编译原理第四版的词法分析器，包括设计文档，自己写的源码，希望对大家有用。-Compile the principle of the fourth edition of the lexical analyzer, including design documents, write their own source code, the hope that useful.

词法语法分析器,学习编译原理时做的词法和语法分析程序,-Lexical parser, learning to compile principle of lexical and syntax analysis program,