struct link *Delete(struct link *h,struct link *ps)
{
    struct link *p,*q;
    p=h;
   if(p->data==ps->data)
   {
       h=p->next;
       free(p);
       return h;
   }
   else
   {  while(p->next!=NULL)
       { if(p->next->data==ps->data)
           {
               q=p->next;
               p->next=q->next;
               free(q);
               return h;
           }
           else p=p->next;
       }
       cout<<"未找到要删除的结点!"<<endl;
   }
}