1、理解S属性文法自下而上翻译器的设计方法。

2、理解L属性文法自上而下翻译器的设计方法。

2、熟悉YACC（BISION，与YACC兼容）工具的使用，理解YACC工具的工作原理和利用YACC工具设计语法分析器和翻译器的方法。

-Design method of 1, understand the S attribute grammar from bottom to top.



2, understand the design method of the L attribute grammar from top to bottom.



2, familiar with the YACC (BISION, YACC compatible) the use of tools, understand the working principle of YACC tools and methods to design YACC tools parser and interpreter using.