简单的词法分析程序，可执行，大二时做的简单词法分析器，可打开源文件分析词法。-A simple lexical analysis program, executable, sophomore, when doing a simple lexical analyzer, lexical analysis can open the source file.

一个列出所有Lexsil序列的程序，可直接使用- This program generates all subsets by lexical order

his document explains how to construct a compiler using lex and yacc. Lex and yacc are tools used to generate lexical analyzers and parsers. I assume you can program in C and understand data structures such as linked-lists and trees. The Overvie