Answers for "insertion in binary search tree in c++"

BST insertion

public class BinarySearchTree {

    public class Node {
        //instance variable of Node class
        public int data;
        public Node left;
        public Node right;

        //constructor
        public Node(int data) {
            this.data = data;
            this.left = null;
            this.right = null;
        }

    }
    // instance variable
    public Node root;

    // constructor for initialise the root to null BYDEFAULT
    public BinarySearchTree() {
        this.root = null;
    }
    
    // insert method to insert the new Date
    public void insert(int newData) {
        this.root = insert(root, newData);
    }

    public Node insert(Node root, int newData) {
        // Base Case: root is null or not
        if (root == null) {
            // Insert the new data, if root is null.
            root = new Node(newData);
            // return the current root to his sub tree
            return root;
        }
        // Here checking for root data is greater or equal to newData or not
        else if (root.data >= newData) {
            // if current root data is greater than the new data then now process the left sub-tree
            root.left = insert(root.left, newData);
        } else {
            // if current root data is less than the new data then now process the right sub-tree
            root.right = insert(root.right, newData);
        }
        return root;
    }

    //Traversal
    public void preorder() {
        preorder(root);
    }

    public void preorder(Node root) {
        if (root == null) {
            return;
        }
        System.out.print(root.data + " ");
        preorder(root.left);
        preorder(root.right);

    }
    public static void main(String[] args) {
        // Creating the object of BinarySearchTree class
        BinarySearchTree bst = new BinarySearchTree();
        // call the method insert
        bst.insert(2);
        bst.insert(4);
        bst.insert(1);
        bst.insert(3);
        bst.insert(5);
        bst.preorder();
    }
    
}

insertion in binary tree

# Python program to insert element in binary tree 
class newNode(): 

	def __init__(self, data): 
		self.key = data
		self.left = None
		self.right = None
		
""" Inorder traversal of a binary tree"""
def inorder(temp):

	if (not temp):
		return

	inorder(temp.left) 
	print(temp.key,end = " ")
	inorder(temp.right) 


"""function to insert element in binary tree """
def insert(temp,key):

	if not temp:
		root = newNode(key)
		return
	q = [] 
	q.append(temp) 

	# Do level order traversal until we find 
	# an empty place. 
	while (len(q)): 
		temp = q[0] 
		q.pop(0) 

		if (not temp.left):
			temp.left = newNode(key) 
			break
		else:
			q.append(temp.left) 

		if (not temp.right):
			temp.right = newNode(key) 
			break
		else:
			q.append(temp.right) 
	
# Driver code 
if __name__ == '__main__':
	root = newNode(10) 
	root.left = newNode(11) 
	root.left.left = newNode(7) 
	root.right = newNode(9) 
	root.right.left = newNode(15) 
	root.right.right = newNode(8) 

	print("Inorder traversal before insertion:", end = " ")
	inorder(root) 

	key = 12
	insert(root, key) 

	print() 
	print("Inorder traversal after insertion:", end = " ")
	inorder(root)

insert binary search tree

void BSNode::insert(std::string value) {

	if (this->_data == value) {
		_count++;
		return;
	}

	if (this->_data > value) {
		if (this->getLeft() == nullptr) {
			this->_left = new BSNode(value);
		}
		this->getLeft()->insert(value);
		return;
	}

	if (this->getRight() == nullptr) {
		this->_right = new BSNode(value);
		return;
	}
	this->getRight()->insert(value);
}