Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
4th Edition
ISBN: 9780134787961
Author: Tony Gaddis, Godfrey Muganda
Publisher: PEARSON
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Chapter 21.1, Problem 21.2CP
Program Plan Intro

Postorder traversal:

It process all the nodes of the tree in the following order.

  • First, traverse all the nodes in the left subtree.
  • Then, traverse all the nodes in the right subtree.
  • Finally, traverse the root node.

Algorithm:

Method “postorder” to print the values stored in a binary tree is as follows:

Node postorder(Node bTree)

{

    //Check tree is not empty

    if (tree != null)

    {

        //Print value of left subtree

        postorder(bTree.left);

        //Print value of right subtree

        postorder(bTree.right);

        //Print the root node value

        System.out.print(bTree.value + " ");

    }

}

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Students have asked these similar questions
c. Given 2 Arrays of Inorder and preorder traversal. Inorder sequence: {D B E A F C} Preorder sequence: {A B D E C F} Construct a tree and print the Postorder traversal.
b. Given the array representation of a binary tree [null value means the node is empty]: [null, P, T, X, null, S, Q, U, null, null, Y, W, R, null, null, V] i. Draw the binary tree. i. Write the post-order and in-order traversal sequence of the tree. i. Convert the tree to a complete binary tree.
What problems do you encounter when you try to define the concept of an inorder traversal for ternary trees?
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