实现标准C语言词法分析器 2．词法分析工作过程中建立符号表、常量表，并以文本文件形式输出； 3．词法分析的最后结果以文本文件形式输出； -Achieve the standard C language lexical analyzer. The lexical analysis of the symbol table in the course of their work, often scale and form of a text file output 3. The outp