用C语言编写一串代码，判断头结点单链表是否为空表

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

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

int isEmpty(Node *head) {
    if (head->next == NULL) {
        return 1;
    } else {
        return 0;
    }
}

int main() {
    Node *head = (Node*)malloc(sizeof(Node));
    head->next = NULL;

    if (isEmpty(head)) {
        printf("The list is empty.\n");
    } else {
        printf("The list is not empty.\n");
    }

    return 0;
}