public/subjects/btreeinsertdata.en.md

## btreeinsertdata

### Instructions

Write a function that inserts new data in a binary search tree
following the properties of binary search trees.
The nodes must be defined as follows:

### Expected function

```go
type TreeNode struct {
	Left, Right, Parent *TreeNode
	Data                 string
}

func BTreeInsertData(root *TreeNode, data string) *TreeNode {

}
```

### Usage

Here is a possible [program](TODO-LINK) to test your function :

```go
package main

import (
    "fmt"
    piscine ".."
)

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

}
```

And its output :

```console
student@ubuntu:~/piscine-go/btreeinsertdata$ go build
student@ubuntu:~/piscine-go/btreeinsertdata$ ./btreeinsertdata
1
4
5
7
student@ubuntu:~/piscine-go/btreeinsertdata$
```