• Almighty Bob (4/4) Feb 24 2015 Is there a more accurate way to do a float and or double to
• Justin Whear (5/11) Feb 24 2015 Use std.string.format or std.format.formattedWrite. std.format contains...
• Almighty Bob (3/18) Feb 24 2015 that did it, thanks,
• Almighty Bob (6/6) Feb 24 2015 Just to clarify what i needed was...
• H. S. Teoh via Digitalmars-d-learn (13/19) Feb 24 2015 What about std.format.format("%.12f", myFloat)?

"Almighty Bob" <bob almighty.com> writes:

Is there a more accurate way to do a float and or double to 
string than...

to!string(float);

As that seems to limit itself to 6 digits.

Justin Whear <justin economicmodeling.com> writes:

On Tue, 24 Feb 2015 20:04:04 +0000, Almighty Bob wrote:

 Is there a more accurate way to do a float and or double to string
 than...
 
 to!string(float);
 
 As that seems to limit itself to 6 digits.

Use std.string.format or std.format.formattedWrite.  std.format contains 
a description of the various format specifiers.  You'll probably want 
something like "%.12f", which formats a floating point number with 12 
digits of precision.

"Almighty Bob" <bob almighty.com> writes:

On Tuesday, 24 February 2015 at 20:08:55 UTC, Justin Whear wrote:
 On Tue, 24 Feb 2015 20:04:04 +0000, Almighty Bob wrote:

 Is there a more accurate way to do a float and or double to 
 string
 than...
 
 to!string(float);
 
 As that seems to limit itself to 6 digits.

 Use std.string.format or std.format.formattedWrite.  std.format 
 contains
 a description of the various format specifiers.  You'll 
 probably want
 something like "%.12f", which formats a floating point number 
 with 12
 digits of precision.

that did it, thanks,

:)

"Almighty Bob" <bob almighty.com> writes:

Just to clarify what i needed was...

%.8g  or  %.7e

Significant digits, or fixed width scientific form. I needed more 
significant digits.

%.8f controls how many digits to print after the decimal point, 
which is not the same thing.

"H. S. Teoh via Digitalmars-d-learn" <digitalmars-d-learn puremagic.com> writes:

On Tue, Feb 24, 2015 at 08:04:04PM +0000, Almighty Bob via Digitalmars-d-learn
wrote:
 Is there a more accurate way to do a float and or double to string
 than...
 
 to!string(float);
 
 As that seems to limit itself to 6 digits.

What about std.format.format("%.12f", myFloat)?

Or, if you like:

	string floatToString(F)(F f)
		if (isFloatingPoint!F)
	{
		// Extract as many digits as are available for this
		// type.
		return std.format.format("%.*f", F.dig, f);
	}


T

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