假设Q[0,5]是一个循环队列,初始状态为 front=rear=0,请画出做完下列操作后队列的头尾指针的状态变化情况d, e, b, g, h入队
时间: 2024-09-26 07:05:11 浏览: 46
假设我们有一个大小为5的循环队列Q[0,5],初始状态下front和rear都指向0:
- **d** 入队操作 d:当只有一个元素b入队时,由于队列为循环队列,front不变(0),rear加一(1)。队列状态变为 Q[0, 1],front = 0, rear = 1。
- **e** 入队操作 e:再入队元素e,由于队已满(rear = 1 到 5),rear自动置回0(循环开始),这时front仍为0,所以rear = 0。队列状态变为 Q[0, 2],front = 0, rear = 0。
- **b** 入队操作 b:元素b再次入队,rear加一(1),因为前面的e已经在队尾了。队列状态变为 Q[0, 3],front = 0, rear = 1。
- **g** 入队操作 g:又来一个g,rear = 2,因为队尾需要跳过已满的部分回到下一位。队列状态变为 Q[0, 4],front = 0, rear = 2。
- **h** 入队操作 h:最后一个元素h入队,rear加一(3),但由于数组是循环的,3+5=8实际上是3。队列状态变为 Q[0, 5],front = 0, rear = 3。
总结以上过程:
```
初始: 0-0
d: 0-1
e: 0-0
b: 0-1
g: 0-2
h: 0-3 (或 0-8, 因为循环)
```
相关问题
假设Q10.6]是一个循环队列,初始状态为front =rear-0,画出做完下列操作后队列的头尾指 针的状态变化情况,若不能入队,请指出其元素,并说明理由。 d.e入队;d出队;ijk,m入队;1.0.p入队
操作前,队列状态为:
```
front = rear = 0
```
a. 元素d入队后,队列状态变为:
```
front = 0, rear = 1
+---+---+---+---+---+---+---+---+---+---+
| d | | | | | | | | | |
+---+---+---+---+---+---+---+---+---+---+
```
b. 执行出队操作d,队列状态变为:
```
front = 1, rear = 1
+---+---+---+---+---+---+---+---+---+---+
| | | | | | | | | | |
+---+---+---+---+---+---+---+---+---+---+
```
c. 元素ijk,m入队后,队列状态变为:
```
front = 1, rear = 3
+---+---+---+---+---+---+---+---+---+---+
| | i | j | k | m | | | | | |
+---+---+---+---+---+---+---+---+---+---+
```
d. 元素1,0,p入队后,队列状态变为:
```
front = 1, rear = 6
+---+---+---+---+---+---+---+---+---+---+
| | i | j | k | m | 1 | 0 | p | | |
+---+---+---+---+---+---+---+---+---+---+
```
注意:队列长度为10,已经存满,再次入队元素时会发生队列溢出。
假设Q[0..6]是一个循环队列,初始状态为front=rear=0,画出做完下列操作后队列的头尾指针的状态变化情况,若不能入队,请指出其元素,并说明理由。 d,e入队;d出队;i,j,k,m入队;n,o,p入队
循环队列的基本操作包括入队和出队,循环队列相比于普通队列的特点是可以循环利用空间,避免空间浪费。假设Q[0..6]是一个循环队列,初始状态为front=rear=0,接下来进行一系列操作,分别为d,e入队,d出队,i,j,k,m入队,n,o,p入队。根据这些操作,队列的状态变化如下所示:
1. d入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| d | | | | | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
2. e入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| d | e | | | | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
3. d出队后,队列状态为:
```
+---+---+---+---+---+---+---+
| | e | | | | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
4. i入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| | e | i | | | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
5. j入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| | e | i | j | | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
6. k入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| | e | i | j | k | | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
7. m入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| | e | i | j | k | m | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
8. n入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| n | e | i | j | k | m | |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
9. o入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| n | e | i | j | k | m | o |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
10. p入队后,队列状态为:
```
+---+---+---+---+---+---+---+
| n | e | i | j | k | m | o |
+---+---+---+---+---+---+---+
↑ ↑
front rear
```
此时队列已经满了,再入队无法成功。
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