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（按字典顺序输出）。词法分析的最后结果以文本文件形式输出。-Lexical analysis of the process of the establishment of symbol table, regular scale. And in the form of text file output (according to dictionary order of output). Lexical Analysis of the