bTree.cpp

#include <bits/stdc++.h>
using namespace std
#define ll long long int

class node
{
public:
    int data;
    node* left;
    node* right;

    node(int val)
    {
        data=val;
        left=right=NULL:
    }
};

int main()
{
    node root=new node(1);
    root->left=new node(2);
    root->right=new node(3);
    root->left->right=new node(4);
}