刚学的c语言，能帮我看下那里有问题吗

Question

//_十分感谢_
#include<stdio.h>
#include<stdlib.h>

typedef struct Elemtype
{
    int num[20];
    int sum[10];
    float score; 
}Elemtype;

typedef struct Node
{
    Elemtype Data;
    struct Node* next;
}Node,* LinkList;

LinkList creatList_head(LinkList L)  //_头插法_
{
    LinkList s;
    L=(Node*)malloc(sizeof(Node));
    L->next=NULL;  
    int flag=1;
    while(flag)
    {
        s=(Node*)malloc(sizeof(Node));
        printf("\n请输入姓名，学号，成绩\n");
        scanf("%c",&(s->Data.num[20]));
        scanf("%c",&(s->Data.sum[20]));
        scanf("%3.1f",&(s->Data.score));
        s->next=L->next;
        L->next=s;
        printf("是否继续录入：输入1继续，0结束");
        scanf("%d",&flag);
    }
    return L;
}

void printList(LinkList L)  //_输出_
{
    LinkList p;
    p=L->next;
    while(p!=NULL)
    {
        printf("%d",p->Data.num);
        printf("%d",p->Data.sum);
        printf("%d",p->Data.score);
        printf("\n");
        p=p->next;
    }
}

int main()
{
    LinkList L;
    printf("请输入信息！");
    L=creatList_head(L);
    printList(L);
    return 0;
}

Answer 1

把next定义前的struct去掉吧

typedef struct Node
{
    Elemtype Data;
    struct Node* next;
}Node,* LinkList;