词法分析器C++程序，完整代码。



本程序实现Pascal语言子集单词符号的词法分析程序。具体功能为：

（1）给出各单词符号的类别编码；

（2）词法分析程序应能发现输入串中的错误；

（3）词法分析作为单独一遍编写，词法分析结果为二元式序列组成的中间文件；

-Lexer C++ program, a complete code. The Program for a subset of Pascal language words symbol of the lexical analyzer. Specific functions are: (1) gives the encoding of each word class symbols　(2) lexical analyzer should be able to find errors in the input string　(3), again written as a separate lexical analysis, lexical analysis is composed of binary-type sequence the intermediate file