[DUG] Need help with trunc command delphi 6

[Vikas...]

thank you everyone for your prompt reply.
Yeah surprisingly  currency data type do take care of this.

Wish every one happy new year

regards
Vikas

On Wed, Dec 30, 2009 at 3:52 PM, Kyley Harris <Kyley at harrissoftware.com>wrote:

> Another common issue I've had with doubles is
>
> x := 0
>
> x = 0 can somtimes return false and the debugger might show 0.00000000001
> or something as a value even though it was hardcoded.
>
> I now use routines like NearZero (just an example name) which rounds test
> values to a a reasonable test DP.
>
>
> On Wed, Dec 30, 2009 at 11:19 PM, Kyley Harris <Kyley at harrissoftware.com>wrote:
>
>> Doubles and extendeds have always had minor rounding issues and other
>> little things depending on the OS, and Hardware that its running on. The
>> Currency is a special case which uses whole numbers rather than fractions
>> for arithmetic. Its supposed to be guaranteed accurate to 4dp and they are
>> not processed in the same way.
>>
>>
>> On Wed, Dec 30, 2009 at 9:42 PM, Vikas... <vikas.image at gmail.com> wrote:
>>
>>> Hi Edward,
>>>
>>> I use extended for both.
>>>
>>> does it cause problem?
>>>
>>>
>>> On Wed, Dec 30, 2009 at 1:24 PM, Edward Koryagin <ed_iv2001 at yahoo.co.nz>wrote:
>>>
>>>> Use currency and everything should be fine.
>>>>
>>>> Edward Koryagin
>>>>
>>>>
>>>> --- On Wed, 30/12/09, Edward Koryagin <ed_iv2001 at yahoo.co.nz> wrote:
>>>>
>>>> > From: Edward Koryagin <ed_iv2001 at yahoo.co.nz>
>>>> > Subject: Re: [DUG] Need help with trunc command delphi 6
>>>> > To: "NZ Borland Developers Group - Delphi List" <delphi at delphi.org.nz
>>>> >
>>>> > Received: Wednesday, 30 December, 2009, 8:28 PM
>>>> > What data types do you use for 4.5
>>>> > and 0.1?
>>>> >
>>>> > Edward Koryagin
>>>> >
>>>> >
>>>> > --- On Wed, 30/12/09, Vikas... <vikas.image at gmail.com>
>>>> > wrote:
>>>> >
>>>> > > From: Vikas... <vikas.image at gmail.com>
>>>> > > Subject: [DUG] Need help with trunc command delphi 6
>>>> > > To: delphi at delphi.org.nz
>>>> > > Received: Wednesday, 30 December, 2009, 8:00 PM
>>>> > > Hello everyone,
>>>> > >
>>>> > > I am facing one strange problem here. We are using a
>>>> > > banking teller application ,here we do calculation
>>>> > based on
>>>> > > denominations in short.
>>>> > >
>>>> > > My main problem is when we use this application for
>>>> > long
>>>> > > time with out closing it the trunc start giving
>>>> > incorrect
>>>> > > value what i mean is
>>>> > >
>>>> > >
>>>> > > quantity := trunc(amount/value).
>>>> > >
>>>> > > Sometime when amount = let say 4.5 and value =0.1 it
>>>> > gives
>>>> > > like
>>>> > >
>>>> > > quantity := trunc(4.5/0.1)=44 which is wrong since my
>>>> > > client complain it make them lose of 1 dollar amount.
>>>> > >
>>>> > >
>>>> > > However when i close the application and do again all
>>>> > works
>>>> > > fine.
>>>> > >
>>>> > > Anyone ever faced this problem before  , or anyone
>>>> > know
>>>> > > any substitute for trunc which works
>>>> > > I am using delhi6
>>>> > >
>>>> > > Appreciate your help
>>>> > >
>>>> > >
>>>> > > regards
>>>> > > vik
>>>> > >
>>>> > > --
>>>> > >   vikas
>>>> > >
>>>> > >
>>>> > > -----Inline Attachment Follows-----
>>>> > >
>>>> > > _______________________________________________
>>>> > > NZ Borland Developers Group - Delphi mailing list
>>>> > > Post: delphi at delphi.org.nz
>>>> > > Admin: http://delphi..org.nz/mailman/listinfo/delphi
>>>> > > Unsubscribe: send an email to delphi-request at delphi.org.nz
>>>> > > with Subject: unsubscribe
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > _______________________________________________
>>>> > NZ Borland Developers Group - Delphi mailing list
>>>> > Post: delphi at delphi.org.nz
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>>>> >
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>>  vikas
>>>
>>> _______________________________________________
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>>> Post: delphi at delphi.org.nz
>>> Admin: http://delphi.org.nz/mailman/listinfo/delphi
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>>> unsubscribe
>>>
>>
>>
>>
>> --
>> Kyley Harris
>> Harris Software
>> +64-21-671-821
>>
>
>
>
> --
> Kyley Harris
> Harris Software
> +64-21-671-821
>
> _______________________________________________
> NZ Borland Developers Group - Delphi mailing list
> Post: delphi at delphi.org.nz
> Admin: http://delphi.org.nz/mailman/listinfo/delphi
> Unsubscribe: send an email to delphi-request at delphi.org.nz with Subject:
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>



-- 
 vikas
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