单词频率统计，再次基础上可以开展更广泛的工作

flex，词法自动生成工具，他可以在极短时间内帮助产生编译器的词法c源程序-flex, automatically generated lexical tools in a very short time he can help the compiler generate c source of lexical

（1） 给定一段符合Pascal子集语法的语言，能成功转换成C语言； （2） 一个简单的说明文档； （3） 2007.7.14之前上传到ftp:// C07:C07@10.11.3.71/upload,用学号建立自己的目录； （4） （可额外加分5分）若有出错处理功能，请在说明文档中写明可以处理哪几项错误。 注意事项： （1） 两人一组 （2） 可以使用词法、语法自动生成工具，windows下有Flex，Bison，Linux下有Lex，Yacc，Java的有Jlex，JavaCC，ANTLR等 （3） 不用考虑Pascal和C的关键词不同问题，即Pascal子集语言中假设不出现int，for等作为变量标志符 （4） read()和write()可用由scanf()，printf()等组成的语句转换。 （5） 如果有疑问可以发信给我 xpqiu@fudan.edu.cn.

数学公式分析- The mathematical formula analyzes

Tip ECCP mode with PIC Midrange, compiler using : CCS C 4.068. This is not a program.

输入文法，可以实现对非终结符，终结符的判断，最后判断文法。-importation of grammar can be realized by the end of the non-Fu, Fu end of the judgment, the final judgment of grammar.

编译原理第一次实验内容- Translation principle first experiment content

一个词法分析器的源程序- A morphology analyzer source program

请你们使用一下!可能你们喜欢这个.我在我的电脑上使用过.-you use! You may like this. In my computer use.

Full support for extended regular expressions (those with intersection and complement); Support for some kinds of cycles in grammar; DFA-based operation; Unicode support; C++ only, requires a modern compiler; Lexical analyzers can be configured to get symbols from any input class (built-in support for std::istream, std::wistream and FILE *); Designed to work with Whale, but can work standalone or interface to other parsers.-Full support for extended regular expressions (those with intersection and complement); Support for some kinds of cycles in grammar; DFA-based operation; Unicode support; C only, requires a modern compiler; Lexical analyzers can be configured to get symbols from any input class (built-in support for std::istream, std::wistream and FILE*); Designed to work with Whale, but can work standalone or interface to other parsers.

to maintain address using tree structure