这个是编译原理的词法分析的实验报告！！很不错，希望大家支持...

读取BNF表达式和终结符文件，然后生成相应文法的First、Follow集、文法分析表以及冲突表。-BNF expressions and terminator read the file, and then generates the appropriate grammar First, Follow sets, grammar analysis table, as well as conflict table

这是我自己实现的一个微小的编译程序,附可执行代码的虚拟机,是理解编译原理的绝好材料.-that I realized a small compiler, attached executable code virtual machine, yes understanding of compiler theory excellent material.

编译原理课程设计，输入布尔表达式，然后有系统自动转换为逆波兰四元式-compiler theory of curriculum design, the importation of Boolean expressions, and then the system automatically converted to reverse Poland four yuan-

lr(0),语法分析，界面很漂亮，利用Ｃ＋＋语言，可生成语法树-lr(0),parsing, interface is beautiful,use c++,can create syntax tree

逆波兰式表示法的生成程序，挺好的！实现了从中缀向后缀的转变-Reverse Polish Notation notation generation process, quite good! Realized the transformation from infix to suffix

一个很好的词法分析器！- A very good morphology analyzer!

多功能运算器- Multi-purpose logic unit

简单的词法分析，可以识别关键字错误，识别无效符号等等，通用！-Simple lexical analysis to identify the wrong keywords, identify invalid symbols and so on, General!

为了实现的编译程序实用，源程序可采用自由书写格式，即一行内可以书写多个语句，一个语句也可以占领多行书写；标识符的前20个字符有效；整数用2个字节表示；长整数用4个字节表示。这样词法分析程序的主要工作为： （1）从源程序文件中读入字符。 （2）统计行数和列数用于错误单词的定位。 （3）删除空格类字符，包括回车、制表符空格。 （4）按拼写单词，并用（种别，单词）二元式表示。 （5）根据需要是否填写标识符表供以后各阶段使用。 这里采用的编译程序的实现方法是一遍扫描，即从左到右只扫描一次源程序，也就是词法分析作为语法分析的一个子程序。故在编写词法分析程序时，用重复调用词法分析子程序取一单词的方法得到整个源程序的二元式流。 -in order to achieve the compiler practical, available free to write source code format, that his writing can be more than words, a statement can occupy multiple lines written; identifier of 20 characters effective; Integer with two byte; long integer with four byte. This lexical analysis for major work : (1) from source document read into the characters. (2) Statistics and a few mistakes out a few words for positioning. (3) delete the blank type characters, including the carriage return, tab spaces. (4) the spelling words and use (other species, words) dual ceremony. (5) whether the need for completing the table identifier subsequent stages. Here the compilers of th

计算机科班学生的词法分析作业，用flex处理生成的VC源程序。- The computer regular professional training student s lexical analysis work, processes the production with flex the VC source program.