二叉树镜像

void TreeMirror(BinaryTreeNode *pNode) 
{

	if(pNode == NULL)
	   return;
	if(pNode->lChild == NULL && pNode->rChild == NULL)
	     return;
	BinaryTreeNode *temp = pNode->lChild;
	      pNode->lChild = pNode->rChild;
		  pNode->rChild = temp;
	if(pNode->lChild != NULL)
	   TreeMirror(pNode->lChild);
	if(pNode->rChild != NULL)
	   TreeMirror(pNode->rChild);
}