二叉树的镜像

题目描述

操作给定的二叉树，将其变换为源二叉树的镜像。 

输入描述:

二叉树的镜像定义：源二叉树 
    	    8
    	   /  
    	  6   10
    	 /   / 
    	5  7 9 11
    	镜像二叉树
    	    8
    	   /  
    	  10   6
    	 /   / 
    	11 9 7  5

/*
struct TreeNode {
    int val;
    struct TreeNode *left;
    struct TreeNode *right;
    TreeNode(int x) :
            val(x), left(NULL), right(NULL) {
    }
};*/
class Solution {
public:
    void Mirror(TreeNode *pRoot) {
            if (pRoot == NULL)
                return ;
            if (pRoot->left != NULL)
                Mirror(pRoot->left);
            if (pRoot->right != NULL)
                Mirror(pRoot->right);
            TreeNode *ptem = pRoot->left;
            pRoot->left = pRoot->right;
            pRoot->right = ptem;
    }
};