C语言创建带头结点的链表的代码

以下是创建带头结点的链表的 C 语言代码：

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

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

Node *createList() {
    Node *head = (Node *) malloc(sizeof(Node));
    head->next = NULL;
    return head;
}

void insert(Node *head, int data) {
    Node *newNode = (Node *) malloc(sizeof(Node));
    newNode->data = data;
    newNode->next = head->next;
    head->next = newNode;
}

void printList(Node *head) {
    Node *p = head->next;
    while (p != NULL) {
        printf("%d ", p->data);
        p = p->next;
    }
    printf("\n");
}

int main() {
    Node *head = createList();
    insert(head, 1);
    insert(head, 2);
    insert(head, 3);
    printList(head);
    return 0;
}