编译课程设计：算符优先算法分析，firstVT,lastVT,符号串分析-Operator First Algorithm

这是一个算符优先文法的语法分析器，主要可一将文法的FIRSTVT和LASTVT找出，并用自下而上的方法规约语句。-This is an operator precedence grammar parser, the grammar can be a major FIRSTVT and LASTVT find, and bottom-up approach with the Statute of the statement.

简单的First&Follow集的求取，可用于开发编译器-First & Follow simple set to strike, can be used to develop compiler