用c语言写：请编程序建立一个带有头节点的单向链表，链表节点中的数据通过键盘输入，当输入数据为-1时，表示输入结束（链表头节点的data域不放数据，表空的条件是ph->next==NULL） #include<stdio.h>

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

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

void createList(Node *head) {
    Node *p, *q;
    p = head;
    int num;
    printf("请输入数据：");
    scanf("%d", &num);
    while (num != -1) {
        q = (Node*)malloc(sizeof(Node));
        q->data = num;
        q->next = NULL;
        p->next = q;
        p = q;
        printf("请输入数据：");
        scanf("%d", &num);
    }
}

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

int main() {
    Node *head = (Node*)malloc(sizeof(Node));
    head->next = NULL;
    createList(head);
    printList(head);
    return 0;
}