我想要解决删除链表中所以重复得数据，下面第一次比较，不知道问题出在哪里。
void LinkList::DeleteOfReapeat()
{     
     Node *p,*q,*l,*index;

     p = head->next;

     q = p->next;                    

     int value = 0;
    
     int i = 0;
   
    
           
              while(q != NULL)
             {
                 if(p->data == q->data)
                 {
                       index= head->next;
                       
                       while(i<value) {index = index->next;i++;}    // 定位q前一个结点

                       l = q;

                       q = index;

                       index = index->next->next;        //会不会这里出问题？
                       
                       delete l;

                       value --;
                 }
                                     q = q->next;

                 value ++;

                 i = 0;
                

             }

}