On 15 Dec 2018, at 5:35pm, Keith Medcalf <kmedc...@dessus.com> wrote:
> Fast forward 25 years and you would these days be hard pressed to find a > computer that DOES NOT use proper IEEE-754 floating point and that DOES NOT > default to a minimum of double precision representation and that DOES NOT use > extended precision internally to ensure that the 1 ULP guarantee is ensured. > However, the memory of the proletariat is long: Even though the original > issue leading to the quaint "do not use floating point for money" aphorism no > longer exists the problem of knowing "why this was so" still exists. And the > propensity to apply intermediate rounding still exists. And yet ... here we are. The post which started this thread summed currency amounts and reached a total of 211496.25999999992 . Yes, you can say 'that would have been rounded before it was printed'. But then you're into the old questions: do you round at every step, or only at the end ? Do you round or truncate ? Where does the fraction go ? etc. etc.. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
