说明：  编译技术词法分析算法。对一个C语言源程序进行词法分析，分为保留字、标示符、常量、分隔符、特殊符号五类。使用了超前搜索算法，java语言编写。
(Lexical analysis algorithm compiler technology. Of a C language source code for lexical analysis, divided into reserved words, identifiers, constants, delimiters, five special symbols. The use of advanced search algorithms, java language.)