[Lazarus] Problem rounding values at post

[zeljko]

On 06/04/2014 10:43 AM, Mattias Gaertner wrote:
> On Wed, 04 Jun 2014 15:47:24 +0800
> "Allan E. Registos" <allan.registos at smpc.steniel.com.ph> wrote:
>
>> On Wednesday, 04 June, 2014 06:03 AM, Philippe wrote:
>>>
>>> generally, if one needs accurate values he does not use real values
>>> ... use integer (or word, longint, longword etc) ... then when needed
>>> make the conversion or formating (for computing or printing) ...
>>>
>> My thinking is quite the opposite. I am not a mathematician though. :)
>> What if we need a high degree of precision in our computation?  So we
>> need this type of figure: #####.##### the more precision(accuracy) we
>> need, the more digits
>
> If you need 5 digits, i.e. decimals: multiply by 100.000 when
> storing and divide by 100.000 when loading the value.
> Computers work on binary numbers and decimal 1.2 (= 1+2/10) has no exact
> representation in binary.

That's why numeric type is used. Saving field as integer and divide it 
while loading is stupid if you have correct numeric type in db.

zeljko