用循环队列实现元素倒置

循环队列的元素倒置，可以通过以下步骤实现：

1. 定义一个循环队列，并初始化队列中的元素。
2. 定义两个指针front和rear，分别指向队列的队首和队尾。
3. 使用while循环，将队首指针front和队尾指针rear向中间移动，同时交换它们所指向的元素，直到它们相遇为止。
4. 输出倒置后的队列元素。

下面是一个示例代码，实现了循环队列元素倒置的功能：

class CircularQueue:
    def __init__(self, capacity):
        self.capacity = capacity
        self.queue = [None] * capacity
        self.front = -1
        self.rear = -1

    def enqueue(self, data):
        if (self.rear + 1) % self.capacity == self.front:
            print("Queue is full\n")
        elif self.front == -1:
            self.front = 0
            self.rear = 0
            self.queue[self.rear] = data
        else:
            self.rear = (self.rear + 1) % self.capacity
            self.queue[self.rear] = data

    def dequeue(self):
        if self.front == -1:
            print("Queue is empty\n")
        elif self.front == self.rear:
            temp = self.queue[self.front]
            self.front = -1
            self.rear = -1
            return temp
        else:
            temp = self.queue[self.front]
            self.front = (self.front + 1) % self.capacity
            return temp

    def display(self):
        if self.front == -1:
            print("Queue is empty\n")
        else:
            i = self.front
            while i != self.rear:
                print(self.queue[i], end=" ")
                i = (i + 1) % self.capacity
            print(self.queue[i])


def reverse_queue(queue):
    front = queue.front
    rear = queue.rear
    while front < rear:
        temp = queue.queue[front]
        queue.queue[front] = queue.queue[rear]
        queue.queue[rear] = temp
        front += 1
        rear -= 1


# Test the code
queue = CircularQueue(5)
queue.enqueue(1)
queue.enqueue(2)
queue.enqueue(3)
queue.enqueue(4)
queue.enqueue(5)
print("Original queue:")
queue.display()

reverse_queue(queue)
print("Reverse queue:")
queue.display()

输出结果为：

Original queue:
1 2 3 4 5 
Reverse queue:
5 4 3 2 1