所上载的是一个用lex与yacc开发的表达式计算器

利用 lex 和yacc自动生成C语言子集的词法分析和语法分析程序的源程序-using lex and generates automatic generation of C language subset of lexical analysis and parsing the source code of procedure

语法分析的功能： 语法分析是编译过程的核心部分，它的主要任务是按照和程序语言的语法规则，从由词法分析输出的源程序符号串中识别出各类语法分析成分，同时进行语法检查，为语义分析和代码生成作准备。 有报告-Parsing functions: syntax analysis is the core of the compiler process, its main tasks and procedures in accordance with the grammatical rules of language, from the output by the lexical analysis of source symbols to identify all types of string parsing components, at the same time syntax checker for semantic analysis and code generation to make preparations. There are reports

一个简单的识别运算的编译器程序，在windows下运行-Identification of a simple computing program compilers, run at windows

编译原理 词法分析器 识别标识符，关键字，运算符，常量，界符包括出错处理-compiler theory lexical analyzer identification identifiers, keywords, Operators, constants, and address sector including error handling

构造接受语言{{}}的一台自动机，对于任意输入的一个字符串，模拟其运行过程，判断字符串是否接受。-structure acceptable language (()) of an automatic machine for the indiscriminate importation of a string, its process simulation, the judge whether to accept the string.

LEX程序 用来生成词法分析器-LEX procedure uses for to produce the morphology analyzer

三菱公司的单片机编程软件，想学的不妨看看。有意去三菱的最好学学。-Mitsubishi microcontroller programming software, I would like to learn to look at. Mitsubishi intends to learn the best.

比dos下的debug更好的debug程序源码- Compared to under dos debug better debug procedure source code

目的：通过编写简单的YACC程序熟悉YACC词法分析工具的基本用法，及词法分析器的设计思路。编写包括赋值语句、if语句以及含有加合乘运算的表达式等语法结构的pascal子集语言的语法分析器。 功能：程序由两个模块LEX和YACC构成，YACC使用LEX分析后的正规单词输出流-Objective : to prepare a simple procedure with YACC YACC lexical analysis of the basic tools to use, and the lexical analyzer designs. Preparation including assignment if statements containing Addition and multiplication of expressions such as grammatical structure of the pascal subset of the language syntax analyzer. Function : procedures by the two modules constitute LEX and YACC, YACC LEX analysis using the formal word output streams

补充一个tc20英文版的编译器- Supplements a tc20 English version the compiler