Driver code
int main ( ) { struct node * root = newnode ( 10 ) ; root -> right = newnode ( 50 ) ; root -> right -> right = newnode ( 15 ) ; root -> left = newnode ( 20 ) ; root -> left -> left = newnode ( 50 ) ; root -> left -> right = newnode ( 23 ) ; root -> right -> left = newnode ( 10 ) ; func ( root ) ; return 0 ; }