1)　　写出符合算符优先法的文法及属性文法。

2)　　完成题目要求的中间代码三地址表示的描述。

3)　　写出算符优先法的思想，完成语法分析和语义分析程序设计。

4)　　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。

-1) to write the law in line with the priority operator grammar and attribute grammar. 2) complete the subject requirements of the three address intermediate code that descr iption. 3) write operator priority law thinking, the completion of parsing and semantic analysis of program design. 4) a good analysis of the preparation process, the design of a number of use cases, the test and through the design of analytical procedures.