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// File: array_binary_tree_test.go
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// Created Time: 2023-07-24
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// Author: Reanon (793584285@qq.com)
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package chapter_tree
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import (
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"fmt"
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"testing"
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. "github.com/krahets/hello-algo/pkg"
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)
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func TestArrayBinaryTree(t *testing.T) {
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// 初始化二叉树
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// 这里借助了一个从数组直接生成二叉树的函数
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arr := []any{1, 2, 3, 4, nil, 6, 7, 8, 9, nil, nil, 12, nil, nil, 15}
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root := SliceToTree(arr)
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fmt.Println("\n初始化二叉树")
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fmt.Println("二叉树的数组表示：")
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fmt.Println(arr)
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fmt.Println("二叉树的链表表示：")
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PrintTree(root)
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// 数组表示下的二叉树类
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abt := newArrayBinaryTree(arr)
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// 访问节点
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i := 1
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l := abt.left(i)
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r := abt.right(i)
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p := abt.parent(i)
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fmt.Println("\n当前节点的索引为", i, "，值为", abt.val(i))
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fmt.Println("其左子节点的索引为", l, "，值为", abt.val(l))
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fmt.Println("其右子节点的索引为", r, "，值为", abt.val(r))
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fmt.Println("其父节点的索引为", p, "，值为", abt.val(p))
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// 遍历树
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res := abt.levelOrder()
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fmt.Println("\n层序遍历为：", res)
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res = abt.preOrder()
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fmt.Println("前序遍历为：", res)
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res = abt.inOrder()
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fmt.Println("中序遍历为：", res)
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res = abt.postOrder()
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fmt.Println("后序遍历为：", res)
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}
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