text: Driver program to test above functions
code: int main ( ) { struct Node * root = newNode ( 10 ) ; root -> left = newNode ( 20 ) ; root -> right = newNode ( 30 ) ; root -> left -> left = newNode ( 40 ) ; root -> left -> right = newNode ( 50 ) ; int n = 4 ; NthInorder ( root , n ) ; return 0 ; }