这个是一个编译原理的词法和语法分析的程序，运行时必须输入一个小程序，即子程序，子程序的内容不受限制-this is a compiler principles of morphology and syntax analysis, the running time to allow the importation of a small program that subroutine, the unrestricted subroutine

PL0扩展功能——编译原理课程设计 有运算符的扩充等-PL0 extensions- Principles of curriculum design compiler operator expansion, etc.

编译原理中最常用的词法分析，能对简单的代码进行词法分析。-Compiler Construction Principles of the most commonly used lexical analysis, energy code for a simple lexical analysis.

编译原理课程设计代码 包含词法 语法分析器 和中间代码生成器-Principles of Course Design Compiler Code