public/subjects/btreeapplypreorder.en.md

btreeapplypreorder

Instructions

Write a function that applies a function using a preorder walk to each element in the tree.

Expected function

func BTreeApplyPreorder(root *TreeNode, f func(...interface{}) (int, error)) {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	piscine ".."
)

func main() {
	root := &piscine.TreeNode{Data: "4"}
	piscine.BTreeInsertData(root, "1")
	piscine.BTreeInsertData(root, "7")
	piscine.BTreeInsertData(root, "5")
	piscine.BTreeApplyPreorder(root, fmt.Println)

}

And its output :

student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
4
1
7
5
student@ubuntu:~/[[ROOT]]/test$