编译原理课程的词法分析程序。

该程序主要是完成上述Pascal语言子集单词符号的词法分析；不区分大小写，字母为a-z A-Z，数字为0-9；‘/*……*/’为程序的注释部分；词法分析程序应能发现输入串中的错误；词法分析结果为二元式序列组成的中间文件。-Compiler theory courses lexical analysis procedure. The program is the completion of a subset of the Pascal language lexical analysis of word symbols　insensitive, letters az AZ, numbers 0-9　' /* ......* /'　comment section of the program　lexical analysis procedures should can find errors in the input string　lexical analysis as a sequence of binary-type intermediate file.