Q19_MirrorOfBinaryTree.java

/**
* Created by holten on 2019-02-14.
* Email: holten.ko@foxmail.com
*/

/**
public class TreeNode {
    int val = 0;
    TreeNode left = null;
    TreeNode right = null;

    public TreeNode(int val) {
        this.val = val;

    }

}
*/
public class Solution {
    public void Mirror(TreeNode root) {
        TreeNode temp;
        if(root!=null){
            temp=root.left;
            root.left=root.right;
            root.right=temp;
            if(root.left!=null) Mirror(root.left);
            if(root.right!=null) Mirror(root.right);
        }
    }
}