Stop to! rounding?

[Jonathan M Davis]

On Wednesday, July 03, 2013 06:44:33 Josh wrote:
> On Wednesday, 3 July 2013 at 04:32:15 UTC, Jonathan M Davis wrote:
> > On Wednesday, July 03, 2013 06:23:12 Josh wrote:
> >> writeln(to!double("151.42499"));    //prints 151.425
> >> 
> >> Is there any way to stop this rounding?
> > 
> > No. double can't hold the value 151.42499. There are _tons_ of
> > values that it
> > can't hold exactly. The same goes for float and real. Floating
> > point values are
> > rounded all the time. Note that
> > 
> >     double d = 151.42499;
> >     writeln(d);
> > 
> > prints exactly the same thing as your example.
> > 
> > - Jonathan M Davis
> 
> Is there any way I would be able to hold that number then?

Without rounding? You'd need fixed point math rather than floating point math. 
There is nothing built into the language to support that (or into any C-based 
language of which I'm aware). I believe that C libraries exist which provide 
it though.

http://en.wikipedia.org/wiki/Fixed-point_arithmetic

Most people just use floating point though, since in most cases, you really 
don't need fixed point.

- Jonathan M Davis