编制一个递归下降分析程序，实现对词法分析程序所提供的单词序列的语法检查和结构分析。 利用C语言编制递归下降分析程序，并对简单语言进行语法分析。 -The preparation of a recursive descent parser, lexical analyzer to achieve the sequence of words provided by the syntax check and structural analysis. Use of C language co

用C语言编写的编译原理词法分析器，可读取文件，功能非常强大(The Compiling Principle lexical analyzer, written in C language, can read the file, and the function is very powerful.)