使用c语言完成双向循环链表

好的，以下是使用 C 语言完成双向循环链表的代码：

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

struct Node {
    int data;
    struct Node* next;
    struct Node* prev;
};

struct Node* head = NULL;

void insert(int data) {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    newNode->data = data;
    newNode->next = NULL;
    newNode->prev = NULL;

    if (head == NULL) {
        head = newNode;
        head->next = head;
        head->prev = head;
    } else {
        struct Node* temp = head;
        while (temp->next != head) {
            temp = temp->next;
        }
        temp->next = newNode;
        newNode->prev = temp;
        newNode->next = head;
        head->prev = newNode;
    }
}

void display() {
    struct Node* temp = head;
    if (head == NULL) {
        printf("List is empty\n");
    } else {
        printf("List elements: ");
        do {
            printf("%d ", temp->data);
            temp = temp->next;
        } while (temp != head);
        printf("\n");
    }
}

int main() {
    insert(1);
    insert(2);
    insert(3);
    insert(4);
    insert(5);

    display();

    return 0;
}

希望这个代码能够帮到你！