标准C语言的词法分析器的lex文件，可以经过lex处理编译为标准C语言的词法分析器的C源文件，再编译这些源文件生成词法分析器。-Lex file of the standard C language parser, the parser can after lex handle compiled for the standard C language C source file, and then compile these source files to generate the parser