题目:输入一棵二叉搜索树,将该二叉搜索树转换成一个排序的双向链表。要求不能创建任何新的结点,只能调整树中节点的指针指向。二叉树的结点定义如下:
struct BinaryTreeNode
{
int m_nValue;
BinaryTreeNode* m_pLeft;
BinaryTreeNode* m_pRight;
}利用递归来解决问题
BinaryTreeNode* Convert(BinaryTreeNode* pRootOfTree)
{
BinaryTreeNode* pLastNodeInList=NULL;
ConvertNode(pRootOfTree,&pLastNodeInList);
BinaryTreeNode *pHeadOfList=pLastNodeInList;
while(pHeadOfList!=NULL&&pHeadOfList->m_pLeft!=NULL)
pHeadOfList=pHeadOfList->m_pLeft;
return pHeadOfList;
}
void ConvertNode(BinaryTreeNode* pNode,BinaryTreeNode** pLastNodeInList)
{
if(pNode==NULL)
return;
BinaryTreeNode *pCurrent=pNode;
if(pCurrent->m_pLeft!=NULL)
ConvertNode(pCurrent->m_pLeft,pLastNodeInList);
pCurrent->m_pLeft=*pLastNodeInList;
if(*pLastNodeInList!=NULL)
(*pLastNodeInList)->m_pRight=pCurrent;
*pLastNodeInList=pCurrent;
if(pCurrent->m_pRight!=NULL)
ConvertNode(pCurrent->m_pRight,pLastNodeInList);
}本文出自 “仙路千叠惊尘梦” 博客,请务必保留此出处http://secondscript.blog.51cto.com/9370042/1585498
原文地址:http://secondscript.blog.51cto.com/9370042/1585498