链表的建立及释放

struct Data
{
    int num;
    int score;
    struct Data *next;
};

struct Data *input()
{
    struct Data *head,*p1,*p2;
    p1=(struct Data*)malloc(LEN);
    p2=(struct Data*)malloc(LEN);
    n=0;
    scanf("%d",&p1->num);
    while(p1->num!=0)
    {
            scanf("%d",&p1->score);
        n++;
        if(n==1)
            head=p1;
        else
            p2->next=p1;
        p2=p1;
        p1=(struct Data*)malloc(LEN);
        scanf("%d",&p1->num);
    }
    p2->next=NULL;
    return head;
}

void Free_List(struct Data *Head)
{
    struct Data *Pointer=NULL;
    while (NULL != Head)
    {
        Pointer = Head;
        Head = Head->Next;  // 下一个节点
        free(Pointer);
    }
}