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Convert a Binary Tree into its Mirror Tree in C++
In this tutorial, we will be discussing a program to convert a binary tree into its mirror tree.
For this, we will be provided with a binary tree. Our task will be to swap the values on the left and the right end creating a mirror tree from the given binary tree.
Example
#include<bits/stdc++.h>
using namespace std;
//binary tree node structure
struct Node{
int data;
struct Node* left;
struct Node* right;
};
//creation of a new node with no child nodes
struct Node* newNode(int data){
struct Node* node = (struct Node*)malloc(sizeof(struct Node));
node->data = data;
node->left = NULL;
node->right = NULL;
return(node);
}
void mirror(struct Node* node){
if (node == NULL)
return;
else{
struct Node* temp;
//swapping the subtrees
mirror(node->left);
mirror(node->right);
temp = node->left;
node->left = node->right;
node->right = temp;
}
}
//printing the inorder traversal
void print_tree(struct Node* node){
if (node == NULL)
return;
print_tree(node->left);
cout << node->data << " ";
print_tree(node->right);
}
int main(){
struct Node *root = newNode(1);
root->left = newNode(2);
root->right = newNode(3);
root->left->left = newNode(4);
root->left->right = newNode(5);
//printing the initial tree
cout << "Inorder traversal of the constructed" << endl;
print_tree(root);
mirror(root);
//printing the mirror tree
cout << "\nInorder traversal of the mirror tree" << endl;
print_tree(root);
return 0;
}Output
Inorder traversal of the constructed 4 2 5 1 3 Inorder traversal of the mirror tree 3 1 5 2 4
Updated on: 02-Jan-2020
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