insertion in binary search tree c++ code example

Example 1: 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)

Example 2: 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);
}