226. Invert Binary Tree

Invert a binary tree.

     4
   /   \
  2     7
 / \   / \
1   3 6   9

to

     4
   /   \
  7     2
 / \   / \
9   6 3   1

1   TreeNode* invertTree(TreeNode* root) {
2        if(root==NULL)
3           return NULL;
4        TreeNode* temp;
5        temp=root->right;
6        root->right=invertTree(root->left);
7        root->left=invertTree(temp);
8        return root;
9     }

posted @ 2018-03-05 14:03  SuperStar~  阅读(84)  评论(0)  编辑  收藏  举报