text: Print nodes at a given level
code: void printGivenLevel ( struct node * root , int level ) { if ( root == NULL ) return ; if ( level == 1 ) printf ( " % d ▁ " , root -> data ) ; else if ( level > 1 ) { printGivenLevel ( root -> left , level - 1 ) ; printGivenLevel ( root -> right , level - 1 ) ; } }