如何在C中为链表头部分配空间？

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

struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));

if (newNode == NULL) {
    printf("内存分配失败");
    return;
}

newNode->next = head;

head = newNode;

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

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

void insertAtBeginning(struct Node** head, int newData) {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    if (newNode == NULL) {
        printf("内存分配失败");
        return;
    }
    newNode->data = newData;
    newNode->next = *head;
    *head = newNode;
}

int main() {
    struct Node* head = NULL;

    insertAtBeginning(&head, 10);
    insertAtBeginning(&head, 20);
    insertAtBeginning(&head, 30);

    struct Node* current = head;
    printf("链表的元素：");
    while (current != NULL) {
        printf("%d ", current->data);
        current = current->next;
    }

    return 0;
}

链表的元素：30 20 10