pl0, written in C, small and there are examples! Detailed notes

使用C语言编写的最简单DFA的JAVA词法分析器，使用文件实现匹配，属性字流和错误信息结果保存在文件中，适合编译初学者学习词法分析器

语义分析器，将语义分析程序编制成子程序，在语法分析器分析出各语法单位后，分析其含义，并将可执行语句或表达式翻译为四元式输出，并将错误信息输出。-Semantic analyzer, semantic analysis program compiled subroutines, in the parser analyzes the syntax of the unit, analyze its meaning, and translated into an executable statement or expression quaternary-output, and error information output.

一个很好的文本编辑，实现了文本文件的创建、读入、保存。文件内容的修改：字、词、段的插入、删除、修改。文件内容的查找、替换：词，文件内容的Copy、Paste。不使用MFC-a good text editor, the realization of the creation of text files, read, the depositary. The contents of the documents modifications : Words, Phrases and of the insertion, deletion, modification. The content of a document search to replace : word, the contents of the documents Copy, Paste. Do not use MFC

词法分析器,将输入的字符串识别成c语言的关键字等-lexical analyzer, the input string as c identification of keywords, such as language

现将本人搜集常用的程序设计语言的词法和形式文法提供给大家。其中，词法是按LEX格式编辑，形式文法是按YACC格式书写，大家可直接用LEX和YACC工具编译生成各类程序设计语言的分析器。-commonly used programming language syntax and grammar forms to the public. Among them, morphology is based on LEX format editing, grammar form is written by YACC format, we can use the LEX and YACC tools various compiler generation programming language analyzer.

拿出这个程序来主要是因为原文中只有一个LEX程序,- Puts out this procedure to come mainly is because in the original text only has a LEX procedure,

JC1.0。本编译器包含完整的文档与程序。借助 Lex & Bison, masm 开发。语句5个，支持混合运算。输入输出作为两个 IO 语句（函数调用），由汇编实现并编译为 io.obj，将由 Link 链接。生成 EXE。整个流程完整清晰，代码易读。-JC1.0. The compiler includes complete documentation and procedures. With Lex Bison, can develop. Statement 5, support mixed computing. Input and output as two IO statement (function call), compiled by the compiler to achieve and io.obj will link Link. EXE generation. The entire process, complete and clear, legible code.

5个微型词法分析器,供参考-five micro-lexical analyzer for reference

使用vc编写的文法分析器课件，对于入门的vc学习者，可以作为windows界面编程的参考-vc prepared by the use of grammar analyzer courseware for the entry vc learners, as windows programming interface reference