C语言环形队列代码示例

以下是一个 C 语言环形队列的代码示例：

#include <stdio.h>
#include <stdlib.h>

#define MAX_SIZE 10

typedef struct {
    int data[MAX_SIZE];
    int front;
    int rear;
} Queue;

void initQueue(Queue *q) {
    q->front = q->rear = ;
}

int isQueueEmpty(Queue *q) {
    return q->front == q->rear;
}

int isQueueFull(Queue *q) {
    return (q->rear + 1) % MAX_SIZE == q->front;
}

void enqueue(Queue *q, int x) {
    if (isQueueFull(q)) {
        printf("Queue is full.\n");
        exit(1);
    }
    q->data[q->rear] = x;
    q->rear = (q->rear + 1) % MAX_SIZE;
}

int dequeue(Queue *q) {
    if (isQueueEmpty(q)) {
        printf("Queue is empty.\n");
        exit(1);
    }
    int x = q->data[q->front];
    q->front = (q->front + 1) % MAX_SIZE;
    return x;
}

int main() {
    Queue q;
    initQueue(&q);
    enqueue(&q, 1);
    enqueue(&q, 2);
    enqueue(&q, 3);
    printf("%d\n", dequeue(&q));
    printf("%d\n", dequeue(&q));
    printf("%d\n", dequeue(&q));
    return ;
}

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