算符优先文法



1.　　可以使用任何语言来完成，例如：Java、C、C++。

2.　　文法采用常用的方式进行描述，例如：S→aA。

3.　　以文件方式读取文法。

4.　　分别求出每一个非终结符的FIRSTVT和LASTVT集。

5.　　画出算符优先关系表。

6.　　判定读入的文法是否是算符优先文法。

7.给定的任意符号串判定是否是文法中的句子，将分析过程用计算机打印出来。

-Operator priority Grammar 1. You can use any language to accomplish, such as: Java, C, C++. 2. Grammar used to describe commonly used methods, such as: S → aA. 3. To read the grammar of papers. 4. Were obtained at each end of a non-FIRSTVT and LASTVT set. 5. Draw operator precedence relations table. 6. To determine whether or not read the grammar is the grammar operator priority. 7. The given string to determine whether any symbol is the grammar of the sentence, will analyze the process of using the computer print out.