求循环队列的长度的代码

循环队列的长度可以通过以下代码实现：

class CircularQueue:
    def __init__(self, k: int):
        self.queue = [None] * k
        self.maxsize = k
        self.front = 0
        self.rear = 0
        self.length = 0

    def size(self) -> int:
        return self.length

其中，`size()`方法返回队列当前的长度，即元素个数。

相关问题

循环队列求队列长度代码

循环队列是一种使用固定大小的数组实现的队列，可以循环利用数组中的空间。求队列长度的代码如下：

#define MAX_SIZE 100

typedef struct {
    int front;  // 队头指针
    int rear;   // 队尾指针
    int size;   // 队列长度
    int data[MAX_SIZE];  // 存放队列元素的数组
} CircularQueue;

// 初始化队列
void initQueue(CircularQueue *queue) {
    queue->front = 0;
    queue->rear = 0;
    queue->size = 0;
}

// 判断队列是否为空
int isEmpty(CircularQueue *queue) {
    return queue->size == 0;
}

// 判断队列是否已满
int isFull(CircularQueue *queue) {
    return queue->size == MAX_SIZE;
}

// 入队
void enqueue(CircularQueue *queue, int element) {
    if (isFull(queue)) {
        printf("Queue is full. Cannot enqueue.\n");
        return;
    }
    
    queue->data[queue->rear] = element;
    queue->rear = (queue->rear + 1) % MAX_SIZE;  // 循环更新队尾指针
    queue->size++;
}

// 出队
int dequeue(CircularQueue *queue) {
    if (isEmpty(queue)) {
        printf("Queue is empty. Cannot dequeue.\n");
        return -1;
    }
    
    int element = queue->data[queue->front];
    queue->front = (queue->front + 1) % MAX_SIZE;  // 循环更新队头指针
    queue->size--;
    
    return element;
}

// 求队列长度
int getQueueLength(CircularQueue *queue) {
    return queue->size;
}

上述代码中，使用`CircularQueue`结构体表示循环队列，其中`front`和`rear`分别指向队头和队尾元素，`size`表示队列的长度，`data`数组存放队列元素。`initQueue`用于初始化队列，`isEmpty`和`isFull`判断队列是否为空或已满，`enqueue`和`dequeue`分别进行入队和出队操作，`getQueueLength`用于求队列长度。

c语言代码求循环队列长度

Sure, I can help you with that. Here's an example of C language code to find the length of a circular queue:

int front, rear, count;
int cq[5];

void cq_length() {
if(front == -1 && rear == -1) {
printf("\nCircular Queue is Empty.");
}
else {
count = (rear+5-front) % 5 + 1; //calculating length of circular queue
printf("\nLength of Circular Queue: %d", count);
}
}

In this code, we are initializing front, rear, and count as integers and cq as an array. Then, we define a function cq_length() to find the length of the circular queue. Finally, we calculate the length using a formula and print the output.

Hope this helps! Let me know if you have any more questions.