层级顺序遍历二叉树 /* Binary tree - Level Order Traversal */
#include<iostream>
#include<queue>
using namespace std;struct Node {char data;Node *left;Node *right;
};// Function to print Nodes in a binary tree in Level order
void LevelOrder(Nod
/*** Definition of TreeNode:* public class TreeNode {* public int val;* public TreeNode left, right;* public TreeNode(int val) {* this.val = val;* this.left = this.right = null;* }* }*/public class Solution {/*** 给出一棵二叉树,返回其节