为初学者提供一个基本的入门级的指导，为有shell编程爱好的初学者提供一个基础教程。-For beginners to provide a basic entry-level guidance, shell programming for the beginner to provide a loving Essentials.

用C语言编写的一个特定文法的词法分析器，内有文法描述PPT和实验指导书，电子科技大学的编译原理实验哦-Using C language of a particular grammar lexical analyzer, there grammar descr iption PPT and guide books, the University of Electronic Science and Technology Compiler Principle Experiment oh