词法分析器构造 通过对给定源语言词法分析程序的设计，加深对词法分析原理的理解，掌握源语言的接受、存贮、预处理和扫描分析，生成正确的 单词符号串二元式序列。 -lexical analyzer structure of a given source language lexical analysis procedures in the design, Lexical analysis to deepen the principle of understanding and masterin