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Data type representing 'Money'
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Conglun Yao
-
Edgar Friendly
- Florent.Ouchet@i...
- Richard Jones
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Edgar Friendly
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Date: | 2009-05-17 (07:10) |
From: | Florent.Ouchet@i... |
Subject: | Re: [Caml-list] Data type representing 'Money' |
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 > > _______________________________________________ > Caml-list mailing list. Subscription management: > http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list > Archives: http://caml.inria.fr > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners > Bug reports: http://caml.inria.fr/bin/caml-bugs >