链表头插法实现打印有问题

Question

我在学习链表的头插法，我写的代码在notepade++上面编译通过后，输入值后，无限打印，不知道是什么原因？有知道的兄弟吗

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

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

void printLink(struct Test *head) {
    struct Test *point = head;
    while (point != NULL) {
        printf("%d ", point->data);
        point = point->next;
    }
    printf("\n");
}

struct Test* insertFromHead(struct Test *head) {
    int newData;
    struct Test *newNode;

    while (1) {
        printf("please input your new node data:\n");
        if (scanf("%d", &newData) != 1) {
            printf("Invalid input\n");
            return head;
        }

        if (newData == 0) {
            printf("0 quit!!\n");
            return head;
        }

        newNode = (struct Test *)malloc(sizeof(struct Test));
        if (newNode == NULL) {
            printf("Memory allocation failed\n");
            return head;
        }

        newNode->data = newData;
        newNode->next = head;
        head = newNode;
    }
    return head;
}

void freeList(struct Test *head) {
    struct Test *current = head;
    while (current != NULL) {
        struct Test *temp = current;
        current = current->next;
        free(temp);
    }
}

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

    head = insertFromHead(head);

    printLink(head);

    freeList(head);

    return 0;
}


![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/206566813007193.png "#left")

Answer 1

#include <stdio.h>
#include <stdlib.h>
struct Test
{
    int data;
    struct Test *next;
};

void printLink(struct Test *head)
{
    struct Test *point = head;
    while (point != NULL)
    {
        printf("%d ", point->data);
        point = point->next;
    }
    printf("\n");
}
struct Test* insertFromHead(struct Test *head)
{
    struct Test *new;
    while(1){
            new = (struct Test *)malloc(sizeof(struct Test));
            printf("please input your new note data:\n");
            scanf("%d",&(new->data));
            if(new -> data == 0){
                printf("0 quit!!\n");
                return head;
            }
            if(head ==NULL){
                head = new;
                
            }else{
                new ->next = head;
                head = new;
    }
    }
    return head;
}
int main()
{
  
    struct Test *head = NULL;

    head = insertFromHead(head);

   printLink(head);
       
    return 0;
}

下面的这个才是我写的又问题的代码