生成一个算符优先文法并给出可行的分析串
时间: 2024-01-22 22:20:04 浏览: 109
以下是一个简单的算符优先文法:
```
E -> E + T | E - T | T
T -> T * F | T / F | F
F -> ( E ) | id
```
其中,id表示一个变量或常量。
下面给出一个可行的分析串:`id + id * id / id - id`
对应的分析过程如下:
```
Step 1: E -> E + T
Stack: E +
Input: id * id / id - id
Action: Shift
Step 2: E -> T
Stack: E + T
Input: * id / id - id
Action: Shift
Step 3: T -> F
Stack: E + T F
Input: * id / id - id
Action: Shift
Step 4: F -> id
Stack: E + T F id
Input: * id / id - id
Action: Reduce T -> F
Step 5: T -> T * F
Stack: E + T
Input: / id - id
Action: Reduce E -> E + T
Step 6: E -> E + T
Stack: E +
Input: / id - id
Action: Shift
Step 7: E -> T
Stack: E + T
Input: / id - id
Action: Shift
Step 8: T -> F
Stack: E + T F
Input: / id - id
Action: Shift
Step 9: F -> id
Stack: E + T F id
Input: / id - id
Action: Reduce T -> F
Step 10: T -> T / F
Stack: E + T
Input: - id
Action: Reduce E -> E + T
Step 11: E -> E + T
Stack: E +
Input: - id
Action: Shift
Step 12: E -> T
Stack: E + T
Input: - id
Action: Shift
Step 13: T -> F
Stack: E + T F
Input: - id
Action: Shift
Step 14: F -> id
Stack: E + T F id
Input: - id
Action: Reduce T -> F
Step 15: T -> T - F
Stack: E + T
Input: END
Action: Reduce E -> E + T
Step 16: E -> E + T
Stack: E
Input: END
Action: Reduce E -> T
```
分析过程结束,输入串被成功分析。
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