void DeleteNode(ListNode** pListHead, ListNode* pToBeDeleted)

 {

     if(!pListHead || !pToBeDeleted)

         return;

     // 要删除的结点不是尾结点

     if(pToBeDeleted->m_pNext != NULL)

     {

         ListNode* pNext = pToBeDeleted->m_pNext;

         pToBeDeleted->m_nValue = pNext->m_nValue;

         pToBeDeleted->m_pNext = pNext->m_pNext;

         delete pNext;

         pNext = NULL;

     }

     // 链表只有一个结点，删除头结点（也是尾结点）

     else if(*pListHead == pToBeDeleted)

     {

         delete pToBeDeleted;

         pToBeDeleted = NULL;

         *pListHead = NULL;

     }

     // 链表中有多个结点，删除尾结点

     else

     {

         ListNode* pNode = *pListHead;

         while(pNode->m_pNext != pToBeDeleted)

         {

             pNode = pNode->m_pNext;

         }

         pNode->m_pNext = NULL;

         delete pToBeDeleted;

         pToBeDeleted = NULL;

     }

 }