(module nestedloop mzscheme
  (require mzlib/defmacro)

  (define-macro (nest n expr)
    (if (> n 0)
	`(let loop ([i 1]) (unless (> i n)
			     (nest ,(- n 1) ,expr)
			     (loop (add1 i))))
	expr))


  (define (main argv)
    (let* ([n (string->number (vector-ref argv 0))]
	   [x 0])
      (nest 6 (set! x (+ x 1)))
      (printf "~s~n" x)))

  (main (current-command-line-arguments)))