c语言链表问题(问了两天了还没搞明白)

Question

有大佬能帮我看看哪里不对吗，真的改了6，7次了，次次都不对

Answer 1

代码修改如下：

#include <stdio.h>
#include <stdlib.h>
struct student
{
    int score;
    struct student* next;
};

struct student* create()
{
    int i = 2;
    struct student* head,*middle,*end;
    head = (struct student*)malloc(sizeof(struct student));
    end = (struct student*)malloc(sizeof(struct student));
    head->next = NULL;
    end->next = NULL;
    middle = head;
    printf("请输入第1个学生的分数：");
    scanf("%d",&end->score);
    while (end->score != -1)
    {
        middle->next = end;
        middle = end;
        end = (struct student*)malloc(sizeof(struct student));
        end->next = NULL;
        printf("请输入第%d个学生的分数：",i);
        scanf("%d",&end->score);
        i++;
    } 
    middle->next = end;
    return head;
}

void print(struct student* a)
{
    struct student *p;
    p=a->next;
    while(p && p->score != -1)
    {
        printf("%d ",p->score);
        p = p->next;
    }
}

int main()
{
    struct student* head = create();
    print(head);
    return 0;
}