The subject says it all.  I have to cast to a double to print values of this type.


Sean

I could be wrong but I believe the printf used in D is the original C function which only supports doubles in its original form. I seem to remember seeing the use of a %lf format specifier on one platform or another to indicate a long double (D real). You might try that to see if it works - your mileage may vary, I don't believe it is a standard.

Sean Kelly wrote:

> The subject says it all.  I have to cast to a double to print values of this type.
> 
> 
> Sean

Cabal wrote:

> I could be wrong but I believe the printf used in D is the original C
> function which only supports doubles in its original form. I seem to
> remember seeing the use of a %lf format specifier on one platform or
> another to indicate a long double (D real).

FWIS, it's %Lf (uppercase L).

> You might try that to see if it
> works - your mileage may vary, I don't believe it is a standard.

Or even use writef now we have it.

>> The subject says it all.

No it doesn't.  It doesn't supply a code sample.

Stewart.

-- 
My e-mail is valid but not my primary mailbox, aside from its being the unfortunate victim of intensive mail-bombing at the moment.  Please keep replies on the 'group where everyone may benefit.

"It doesn't supply a code sample."

semantics, semantics :P  if you can't figure out the problem from the title, you've got issues.

In article <cd936h$e9e$1@digitaldaemon.com>, Stewart Gordon says...
>
>Cabal wrote:
>
>> You might try that to see if it
>> works - your mileage may vary, I don't believe it is a standard.
>
>Or even use writef now we have it.

Oops.  I had thought that printf now silently called writef behind the scenes. My mistake.

>>> The subject says it all.
>
>No it doesn't.  It doesn't supply a code sample.

In this case one shouldn't be necessary, but just to be pedantic:

real x = 1.0;
printf( "%f", x ); // prints garbage

ie. I had thought that printf had been re-implemented by Walter and no longer required the size modifiers.


Sean

Jarrett Billingsley wrote:

> "It doesn't supply a code sample."
> 
> semantics, semantics :P  if you can't figure out the problem from the title, you've got issues.

Why even bring this up? Haven't you noticed by now that everybody has issues? ;-)

"Sean Kelly" <sean@f4.ca> wrote in message news:cd973f$fvg$1@digitaldaemon.com...
> real x = 1.0;
> printf( "%f", x ); // prints garbage

Use %Lf for real's. printf is a C function, and D reals correspond to C long doubles.

> Haven't you noticed by now that everybody has
> issues? ;-)

some more than others ;)

Sean Kelly wrote:
> The subject says it all.  I have to cast to a double to print values of this
> type.
> 
> 
> Sean

This page might be helpful to you: http://www.prowiki.org/wiki4d/wiki.cgi?HowTo/printf

It has a list of format specifiers corresponding to particular D types. If you find a mistake, you can even edit the page to fix it.


With the advent of writef, I'll going to look at phasing out my calls to printf: http://www.digitalmars.com/d/phobos.html#stdio

I think if I'm using writef, I won't run into random garbage or access violations from using the wrong specifier. (Actually errors messages are much more helpful.)

-- 
Justin (a/k/a jcc7)
http://jcc_7.tripod.com/d/