When we want to declare a group of data whether of similar or different data types. We will use a class to declare a single node and use it to declare linked list of nodes. We will now a implement Binary tree using Linked list representation. To learn more about Binary Tree, go through these articles: The right sub tree of a node only contains nodes greter than the parent node's key. The left sub tree of a node only contain nodes less than the parent node's key. To implement binary tree, we will define the conditions for new data to enter into our tree.
Therefore left and right pointers are set to NULL. These nodes do not have pointer to their subtrees. The nodes which doesn't have a child are called ass leaf nodes. Middle box represents the data in the node. Node A has a pointer to the left child that is B and a pointer pointing to the right child of A that is B.
Each node contains a pointer to the left subtree and pointer to the right subtree. Visual Representation:Īs you can see, the topmost node is the parent node of nodes "B" and "C". If a node is at 'i' location then its left child is at '2i' index and right child at '2i + 1' location in the array. Size of array is equal to the total nodes in the tree, index of root node is 0. In this representation, array structure is used to implement the tree. Root node is the topmost node of the tree. What is a Binary tree? (general form)Ī Binary tree is a heirarchichal data structure in which every node has 2 children, also known as left child and right child, as each node has 2 children hence the name "Binary". We have used Object Oriented Programming (OOP) concepts.
In this article, we have explored how to implement Binary Tree Data Structure in C++ including all different operations like traversing, inserting and deleting. Reading time: 25 minutes | Coding time: 40 minutes