GetElem单链表实现

Status GetElem L(LinkList, int i, ElemType &e)
{
    p = L->next;
    j = 1;
    while(p&&j<i)
    {
        p = p->next;
        j++;
    }
    if(!p||j > i) return ERROR;
    e = p->data;
    return OK;
}