On Dienstag, 15. November 2022 09:08:44 CET Chris via KMyMoney-devel wrote:
> Thanks > > I have always used integer's, never floats or doubles, I realised back in > the 90's that was a mistake when implementing credit card transactions. > Rounding errors bite hard. > > I have always decided at the start of a project what was the maximum > precision needed, usually 2 decimal places but occasionally more. I can see > with kmymoney 4 digits is the best because I believe that is normal for > shares. however I don't do shares so I could be wrong. > > Just looked it up, shares below $1.00 is to 4 decimal places, 2 places > otherwise. > > I can see storing it using numerator denominator is more flexible. 4 digits is not enough if it comes to currency exchange. We do have a user that converts between (I believe) Indonesian Rupia and Euros a lot and needs at least 10 digits of precision for the price to get correct results. -- Regards Thomas Baumgart ------------------------------------------------------------- Testing can only prove the presence of bugs, not their absence. -- Edsger W. Dijkstra, 1969 -------------------------------------------------------------
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