[racket] Rounding

The docs say that it is round to even, which is the standard for
floating point numbers [1]. You can write your own rounding operator
that rounds .5 up if need be.

;; Untested
(define (my-round n)
  (let ((r (round n))) (if (= .5 (- n r)) (add1 r) r)))

[1] http://en.wikipedia.org/wiki/Rounding#Round_half_to_even

On Sat, Mar 16, 2013 at 7:21 AM, Eric Nadeau <nado18 at gmail.com> wrote:
> Hi,
>
> I was having problems with a mathematical application I'm writing and narrowed it down to:
>
>         (round 0.5)
>         (round (/ 1 2))
>         (round 1.5)
>         (round (/ 3 2))
>
> giving me
>
>         0.0
>         0
>         2.0
>         2
>
> Since when is round 0.5 not giving 1?!
>
> Cheers,
> Eric
> ____________________
>   Racket Users list:
>   http://lists.racket-lang.org/users