Stop to! rounding?

[Jonathan M Davis]

On Tuesday, July 02, 2013 22:14:33 Ali Çehreli wrote:
> On 07/02/2013 10:09 PM, Jonathan M Davis wrote:
>  > On Wednesday, July 03, 2013 07:04:47 cal wrote:
>  >> void main()
>  >> {
>  >> 
>  >>      double d = 151.42499;
>  >>      assert(d == 151.42499);
>  >> 
>  >> }
>  >> 
>  >> The rounding occurs in writeln surely.
>  > 
>  > That's true because _both_ of the floating point values there get
> 
> rounded to
> 
>  > 151.425,
> 
> The value that can be stored is not 151.42499, nor 151.425.
> 
> import std.stdio;
> import std.conv;
> 
> void main()
> {
>      auto a = to!double("151.42499");
>      writefln("%.60f", a);
> }
> 
> Prints:
> 
> 151.424990000000008194547262974083423614501953125000000000000000
> 
>  > writeln is not doing anything wrong.
> 
> True. It is using its default floating point precision, 6.

Ah. You learn new things every day. Well, I stand corrected. I was half right. 
It isn't 151.42499, but writeln _is_ rounding. I really don't like dealing 
with floating point numbers.

- Jonathan M Davis