Stop to! rounding?

[Ali Çehreli]

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.

Ali