对循环语句： DO〈赋值语句〉WHILE 〈表达式〉

(1)　　按给定的题目写出符合简单优先分析方法要求的文法和属性文法描述。

(2)　　按给定的题目给出简单优先分析方法的思想及分析表设计。

(3)　　按给定的题目给出赋值表达式和控制语句中布尔表达式中间代码序列的结构设计。

(4)　　完成相应的词法分析、语法分析和语义分析程序设计。

(5)　　编制好分析程序后，设计若干用例，上机测试并通过所设计的分析程序。

-Of the loop: DO < assignment>　WHILE < expression>　(1) write the title of a given priority in line with the analysis of simple grammar and attributes required to describe the grammar. (2) by a given subject is given a simple analysis of the ideological priorities and analysis of the design. (3) gives the title of a given assignment statement expressions and Boolean expressions to control the middle of the structural design of the code sequence. (4) the completion of the lexical analysis, grammar analysis and semantic analysis of programming. (5) a good analysis of the preparation process, the design of a number of use cases, test the design through the analysis procedure.