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

思路：先序遍历二叉树

Code:

/* 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) {
            TreeNode* tmp = pRoot->left;
            pRoot->left = pRoot->right;
            pRoot->right = tmp;
            Mirror(pRoot->left);
            Mirror(pRoot->right);
        }
    }
};