void delate(struct student *head,int n)
  {
      struct student *p,*q,*p1;
      printf("plase input delate student old:");
      scanf("%d",&n);
      p=head;
      while(p->next!=NULL)
      {
           if(head->old==n)
          {
              p1=head;
             head=head->next;
            p=head;
        //    head->next=p->next;
            free(p1);
              break;
          }
          else if(p->next->old==n)
          {
              q=p->next;
              p->next=q->next;
             free(q);
             break;
          }
         
         
       else
           p=p->next;
      
  }
      
}
为什么编译后返回就错了呢，是因为没free吗

[此贴子已经被作者于2016-6-5 16:53编辑过]