Re: fixed type (delta) in ada

[Al Christians <achrist@easystreet.com>]

Robert Dewar wrote:
> 
> In article <383f6dbb.22609744@news.tstonramp.com>,
>   nap@nobody.com (Nap) wrote:
> > does anyone know why mutiplication between fixed type in ada
> produce a
> > big round off error?
> >
> > type money is delta 0.01 range 0.0..100_000_000.00;
> > a, b, c : money;
> >
> > package money_io is new ada.text_io.fixed_io(money);
> >
> > a := 351.00;
> > b := 0.20;
> > c := a * b;
> >
> > money_io.put(c);
> >
> > -- the output should be 70.2 but it prints 71.3 instead.
> > -- this is so frustrating. typecasting (back to float) doesn't
> help
> > either.
> 
> No, the output should be 71.3, and this is what is expected. 

So, why does GNAT 3.12p give 68.55?


Al