用flex工具生成一个PL/0语言的词法分析程序，对PL/0语言的源程序进行扫描，识别出单词符号的类别，统计输出各种符号的信息。-Generation tool with a flex PL/0 language lexical analysis procedures, PL/0 language source scan, identify the word symbols category, statistical output of various symbolic information.

This document defines the format for the information generated by compilers, assemblers and linkage editors, that is necessary for symbolic, source-level debugging. The debugging information format does not favor the design of any compiler or deb