c++编写的词法分析器，能够对简单的语法错误进行检测和报错！-written in c++ lexical analyzer can be a simple syntax error detection and error!

这是一个简单的词法分析器。 能对具有简单语法的编程语言进行词法分析。-This is a simple lexical analyzer. Able to have a simple programming language syntax for lexical analysis.