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level order traversal of tree java

whoibrar answered on September 2, 2022 Popularity 7/10 Helpfulness 1/10

answer level order traversal of tree java

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level order traversal of tree java

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// Recursive Java program for level
// order traversal of Binary Tree
 
/* Class containing left and right child of current
   node and key value*/
class Node {
    int data;
    Node left, right;
    public Node(int item)
    {
        data = item;
        left = right = null;
    }
}
 
class BinaryTree {
    // Root of the Binary Tree
    Node root;
 
    public BinaryTree() { root = null; }
 
    /* function to print level order traversal of tree*/
    void printLevelOrder()
    {
        int h = height(root);
        int i;
        for (i = 1; i <= h; i++)
            printCurrentLevel(root, i);
    }
 
    /* Compute the "height" of a tree -- the number of
    nodes along the longest path from the root node
    down to the farthest leaf node.*/
    int height(Node root)
    {
        if (root == null)
            return 0;
        else {
            /* compute  height of each subtree */
            int lheight = height(root.left);
            int rheight = height(root.right);
 
            /* use the larger one */
            if (lheight > rheight)
                return (lheight + 1);
            else
                return (rheight + 1);
        }
    }
 
    /* Print nodes at the current level */
    void printCurrentLevel(Node root, int level)
    {
        if (root == null)
            return;
        if (level == 1)
            System.out.print(root.data + " ");
        else if (level > 1) {
            printCurrentLevel(root.left, level - 1);
            printCurrentLevel(root.right, level - 1);
        }
    }
 
    /* Driver program to test above functions */
    public static void main(String args[])
    {
        BinaryTree tree = new BinaryTree();
        tree.root = new Node(1);
        tree.root.left = new Node(2);
        tree.root.right = new Node(3);
        tree.root.left.left = new Node(4);
        tree.root.left.right = new Node(5);
 
       System.out.println("Level order traversal of
                                 binary tree is ");
       tree.printLevelOrder();
    }
}

Popularity 7/10 Helpfulness 1/10 Language java

Source: www.geeksforgeeks.org

Tags: java traversal tree

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Contributed on Sep 02 2022

whoibrar

0 Answers Avg Quality 2/10

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level order traversal of tree java

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# Recursive Python program for level
# order traversal of Binary Tree
 
# A node structure
 
 
class Node:
 
    # A utility function to create a new node
    def __init__(self, key):
        self.data = key
        self.left = None
        self.right = None
 
 
# Function to  print level order traversal of tree
def printLevelOrder(root):
    h = height(root)
    for i in range(1, h+1):
        printCurrentLevel(root, i)
 
 
# Print nodes at a current level
def printCurrentLevel(root, level):
    if root is None:
        return
    if level == 1:
        print(root.data, end=" ")
    elif level > 1:
        printCurrentLevel(root.left, level-1)
        printCurrentLevel(root.right, level-1)
 
 
""" Compute the height of a tree--the number of nodes
    along the longest path from the root node down to
    the farthest leaf node
"""
 
 
def height(node):
    if node is None:
        return 0
    else:
        # Compute the height of each subtree
        lheight = height(node.left)
        rheight = height(node.right)
 
        # Use the larger one
        if lheight > rheight:
            return lheight+1
        else:
            return rheight+1
 
 
# Driver program to test above function
root = Node(1)
root.left = Node(2)
root.right = Node(3)
root.left.left = Node(4)
root.left.right = Node(5)
 
print("Level order traversal of binary tree is -")
printLevelOrder(root)
 
# This code is contributed by Nikhil Kumar Singh(nickzuck_007)

Popularity 7/10 Helpfulness 2/10 Language python

Source: www.geeksforgeeks.org

Tags: traversal java tree python pytho

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Contributed on Sep 02 2022

whoibrar

0 Answers Avg Quality 2/10

level order traversal of tree java

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