c语言写一个整型循环队列

好的，我可以回答这个问题。下面是一个简单的 C 语言代码示例，用于实现整型循环队列：

#include <stdio.h>
#define MAX_SIZE 5

int queue[MAX_SIZE];
int rear = -1, front = -1;

void enqueue(int num) {
    if ((front == 0 && rear == MAX_SIZE - 1) || (rear == front - 1)) {
        printf("Queue is full!\n");
        return;
    }
    if (front == -1) front = 0;
    rear = (rear + 1) % MAX_SIZE;
    queue[rear] = num;
}

int dequeue() {
    int num;
    if (front == -1) {
        printf("Queue is empty!\n");
        return -1;
    }
    num = queue[front];
    if (front == rear) {
        front = -1;
        rear = -1;
    } else {
        front = (front + 1) % MAX_SIZE;
    }
    return num;
}

void display() {
    int i;
    if (front == -1) {
        printf("Queue is empty!\n");
        return;
    }
    printf("Queue elements are:\n");
    for (i = front; i != rear; i = (i + 1) % MAX_SIZE)
        printf("%d ", queue[i]);
    printf("%d\n", queue[i]);
}

int main() {
    int choice, num;
    do {
        printf("1.Enqueue\n");
        printf("2.Dequeue\n");
        printf("3.Display\n");
        printf("4.Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                printf("Enter the element to be enqueued: ");
                scanf("%d", &num);
                enqueue(num);
                break;
            case 2:
                dequeue();
                break;
            case 3:
                display();
                break;
            case 4:
                break;
            default:
                printf("Invalid choice!\n");
                break;
        }
    } while (choice != 4);
    return 0;
}

这段代码实现了一个整型循环队列，可以通过命令行交互来进行入队、出队和显示队列元素等操作。