From: Florent.Ouchet@imag.fr
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Data type representing 'Money'
Date: Sun, 17 May 2009 09:10:42 +0200 [thread overview]
Message-ID: <20090517091042.112814ytzw8ni3ci@webmail.imag.fr> (raw)
In-Reply-To: <4A0F7508.8090705@gmail.com>
Hi,
Fixed point computing is okay, but the financial world used to play
with 5 fractional digits.
Florent
"Edgar Friendly" <thelema314@gmail.com> a écrit :
> Conglun Yao wrote:
>> Hi all,
>>
>> Is there any data type could be used to represent 'Money' in OCaml,
>> similar to BigDecimal.
>> I see a lot of programs using float directly. Maybe Num would be better,
>> but less document could be found, for example, how to represent 20.27
>>
>> Or there already exist a better solution. Thanks for any help.
>>
>> Conglun
>>
>>
> I'd do fixed point math using Num to count cents (or mills if you really
> need) but displaying dollars and cents. For example: $20.27 would
> internally be represented by the number 2027, and use int arithmetic for
> exact math.
>
> If you used 63-bit ints, you'd probably get away with not even using
> Num, as max_int = 4611686018427387903 would represent the dollar amount
> 46_116_860_184_273_879.03, just short of 50 quadrillion dollars.
>
> E
>
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next prev parent reply other threads:[~2009-05-17 7:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-16 7:27 Conglun Yao
2009-05-17 2:23 ` [Caml-list] " Edgar Friendly
2009-05-17 7:10 ` Florent.Ouchet [this message]
2009-05-17 16:15 ` Harrison, John R
2009-05-17 11:29 ` Richard Jones
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