Binary trees
Binary Tree: A tree whose elements have at most 2 children is called a binary tree. Since each element in a binary tree can have only 2 children, we typically name them the left and right child.
#include <bits/stdc++.h>
using namespace std;
class Node {
public:
int data;
Node* left;
Node* right;
// Val is the key or the value that
// has to be added to the data part
Node(int val)
{
data = val;
// Left and right child for node
// will be initialized to null
left = NULL;
right = NULL;
}
};
int main()
{
/*create root*/
Node* root = new Node(1);
/* following is the tree after above statement
1
/ \
NULL NULL
*/
root->left = new Node(2);
root->right = new Node(3);
/* 2 and 3 become left and right children of 1
1
/ \
2 3
/ \ / \
NULL NULL NULL NULL
*/
root->left->left = new Node(4);
/* 4 becomes left child of 2
1
/ \
2 3
/ \ / \
4 NULL NULL NULL
/ \
NULL NULL
*/
return 0;
}
