语法分析器构造

借助于词法分析程序提供的分析结果，编写一个算符优先语法分析程序，程序能进行语法结构分析和错误检查并产生相应的归约信息。同时给出出错信息和错误类型，从而加深对语法分析的理解。

-parser using lexical analysis procedure for the analysis of results prepare a priority operator syntax analysis procedures, procedures for structural analysis and syntax error checking and produce corresponding reduction information. Also given wrong information and the wrong types, so as to enhance the understanding of syntax analysis.