Re: Programming a calendar system

Mark J. Reed wrote:

>On Wed, Apr 28, 2004 at 02:06:51PM +0200, Carsten Becker wrote:
>
>
>>What are the normal division and the modulo division good for? And what
>>would I have to write when 72 seconds ($asec) are 1 minute ($amin)?
>>
>>
>
>Modulo gives you the remainder after the division, which is therefore
>the number of the next unit down.
>
>For instance, if I told you that 3,296  seconds had passed and asked you
>what that was in minutes and seconds, then you would divide by 60;
>the quotient is the number of minutes and the remainder is the number of
>seconds into the next minute.
>
>        3296 / 60 = 54
>        3296 % 60 = 56
>
>so 3,296 seconds is 54 minutes and 56 seconds, or 4 seconds shy of
>55 minutes.
>
>Exactly how you compute this depends on the language.  In many C-like
>languages the type of the result of the '/' operator depends on the type
>of its operands, so 3296 / 60 = 54, but 3296.0 / 60.0 = 56.933333333
>etc.  In others the result of / is a float whenever the quotient is not
>exact, and you have to explicitly apply a function (usually "floor")
>to get integer form.
>
>
Though not, of course, in C itself, which simply gives the answer as an
integer sans remainder.

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