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通过设计编制调试一个具体的词法分析程序，加深对词法分析原理的理解。并掌握在对程序设计语言源程序进行扫描过程中将其分解为各类单词的词法分析方法。-By designing preparation of debugging a specific lexical analysis process, to deepen understanding of the principles of lexical analysis. And mastery of programming language sour

程序员的SQL金典 PDF扫描版数据库很多编程都要用到适合高级(Golden SQL programmer PDF scan version of the database to be used for advanced many programming)