【剑指offer】18二叉树的镜像

/**
*题目描述:
*操作给定的二叉树,将其变换为源二叉树的镜像。 
*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
*/

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

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

}

public class Solution {
    
    

    //递归
    public void Mirror(TreeNode root) {
        if(root==null)
            return ;

        TreeNode tmp=root.left;
        root.left=root.right;
        root.right=tmp;

        Mirror(root.left);
        Mirror(root.right);
    }

    public static void main(String[] args) {
        Solution s=new Solution();
    }
}

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