N18_二叉树的镜像

Posted 2022-02-11 kexiblog

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

package new_offer;
/**
 * 操作给定的二叉树，将其变换为源二叉树的镜像。
 * @author Sonya
 *思路：递归调用
 */
public class N18_Mirror 
   public void Mirror(TreeNode root) 
	   //TreeNode temp;
        if(root!=null) 
        	TreeNode temp=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);
        
    
   public void print(TreeNode root) 
	   System.out.print(root.val);
	   if(root.left!=null) print(root.left);
	   if(root.right!=null)print(root.right);
   

	public static void main(String[] args) 
		// TODO Auto-generated method stub
		TreeNode t1,t2,t3,t4,t5,t6;
		t1=new TreeNode(1);t2=new TreeNode(2);t3=new TreeNode(3);
		t4=new TreeNode(4);t5=new TreeNode(5);t6=new TreeNode(6);
		t1.left=t2;t1.right=t3;
		t2.left=t4;t2.right=t5;
		t3.left=t3.right=null;
		t4.left=t6;t4.right=null;
		t5.left=t5.right=null;
		t6.left=t6.right=null;
		N18_Mirror n18=new N18_Mirror();
		n18.print(t1);
      System.out.println("            ");
      n18.Mirror(t1);
      n18.print(t1);