Check if two trees are mirror tree of each other

/* C++ Program to check if two trees are mirror tree of each other */
#include<bits/stdc++.h>
using namespace std;

typedef struct Node
{
    int data;
    struct Node *left;
    struct Node *right;
    Node(int ele)
    {
        data = ele;
        left = NULL;
        right = NULL;
    }
} Node;

/* Function to check if two trees are mirror tree of each other */
bool checkMirror(Node *root1, Node *root2)
{
    /* Base Case1: If both Trees are Empty */
    if(root1 == NULL && root2 == NULL)
    return true;
    
    /* Base Case2: If one tree is empty and other not */
    if(root1 == NULL || root2 == NULL)
    return false;
    
    /*
        If Both are Non-Empty, Recursively compare data of left subtree of 
        first tree with right subtree of second tree and vice-versa
    */
    return root1 -> data == root2 -> data &&
           checkMirror(root1 -> left, root2 -> right) &&
           checkMirror(root1 -> right,root2 -> left);
}

int main()
{
    /* Creating a Binary trees and inserting some nodes in it */
    Node *root1 = NULL;
    Node *root2 = NULL;
    
    /* Inserting some Nodes in first tree */
    root1 = new Node(1);
    root1 -> left = new Node(2);
    root1 -> right = new Node(3);
    root1 -> left -> left = new Node(4);
    root1 -> left -> right = new Node(5);
    root1 -> right -> left = new Node(6);
    root1 -> right -> right = new Node (7);
    root1 -> left -> right -> left = new Node(8);
    root1 -> right -> left -> right = new Node(9);
    
    /* Inserting some Nodes in second tree */
    root2 = new Node(1);
    root2 -> right = new Node(2);
    root2 -> left = new Node(3);
    root2 -> right -> right = new Node(4);
    root2 -> right -> left = new Node(5);
    root2 -> left -> right = new Node(6);
    root2 -> left -> left = new Node (7);
    root2 -> right -> left -> right = new Node(8);
    root2 -> left -> right -> left = new Node(9);
    
    /* Calling function to check if two trees are mirror tree of each other*/
    if(checkMirror(root1,root2) == true)
    {
        cout<<"Both Trees are Mirror Tree of Each Other!!";
    }
    else
    {
        cout<<"Both Trees are not Mirror Tree of Each Other!!";
    }
    
}