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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: String literals and wide_string literals - how?
Newsgroups: comp.lang.ada
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Date: Fri, 20 Apr 2007 22:41:35 +0200
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Date: 2007-04-20T22:40:24+02:00
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On 20 Apr 2007 13:01:00 -0700, Adam Beneschan wrote:

> On Apr 20, 12:16 pm, "Randy Brukardt" <r...@rrsoftware.com> wrote:
> 
>> Now throw in some operator overloading:
>>
>>     function "+" (Left, Right : Roman_Numeral) return Roman_Numeral;
>>
>> and you can work solely in Roman_Numerals.
> 
> It would be an interesting challenge to write this function---without
> cheating.  That is, without resorting to converting the operands to
> regular integers, adding them the normal way, and converting the
> result back.  No, no, no.  Do it the way the Romans would have had to
> do it.  Might make for a good programming exercise.

Not that hard, Ada has loop in reverse. I think that for summation, even
one character look-ahead is not actually needed (for IV, IX, XL etc stuff).
One should postpone flushing the last "decimal" place before recognizing
the next one, so that gone astray I, X, C could be subtracted from it.

> And then, if someone gets this right, tell them to implement "*".

Romans used abacus for that, they cheated! (:-))

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de