实现不带头结点的双向循环链表的创建，并进行数据的排序的代码

以下是实现不带头结点的双向循环链表的创建，并进行数据的排序的代码：

#include <iostream>
using namespace std;

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

Node* createNode(int data) {
    Node* newNode = new Node;
    newNode->data = data;
    newNode->prev = NULL;
    newNode->next = NULL;
    return newNode;
}

void insertNode(Node*& head, Node* newNode) {
    if (head == NULL) {
        head = newNode;
        head->prev = head;
        head->next = head;
    }
    else {
        Node* tail = head->prev;
        newNode->next = head;
        newNode->prev = tail;
        head->prev = newNode;
        tail->next = newNode;
    }
}

void sortList(Node*& head) {
    if (head == NULL || head->next == head) {
        return;
    }
    Node* cur = head->next;
    while (cur != head) {
        Node* prev = cur->prev;
        while (prev != head && prev->data > cur->data) {
            prev = prev->prev;
        }
        Node* next = cur->next;
        if (prev != cur->prev) {
            prev = prev->next;
            prev->prev->next = next;
            next->prev = prev->prev;
            prev->prev = cur->prev;
            cur->prev->next = prev;
            cur->next->prev = prev;
            prev->next = cur->next;
        }
        cur = next;
    }
}

void printList(Node* head) {
    if (head == NULL) {
        return;
    }
    Node* cur = head;
    do {
        cout << cur->data << " ";
        cur = cur->next;
    } while (cur != head);
    cout << endl;
}

int main() {
    Node* head = NULL;
    insertNode(head, createNode(3));
    insertNode(head, createNode(1));
    insertNode(head, createNode(4));
    insertNode(head, createNode(2));
    insertNode(head, createNode(5));
    cout << "Original list: ";
    printList(head);
    sortList(head);
    cout << "Sorted list: ";
    printList(head);
    return 0;
}

这段代码实现了不带头结点的双向循环链表的创建，并进行数据的排序。其中，createNode() 函数用于创建新节点，insertNode() 函数用于插入新节点，sortList() 函数用于排序链表，printList() 函数用于打印链表。