Re: format number on gtklabel

[Roger Leigh <rleigh whinlatter ukfsn org>]

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Hariyanto <xhonghar telkom net> writes:

> How I want to send string with number like 3456789 to GtkLabel with the output 3.456.789,00
> I try this code :
>
> str_total = g_strdup_printf("%f", dbl_total);
> str_total_formatted = g_strndup(str_total, strcspn(str_total, ".") +3);
>
> and the output : 3456789.00
>
> How to make the output : 3.456.789,00

It's locale dependent, so make sure LC_NUMERIC is set to a locale that
formats in that style (e.g. da_DK, and presumably your own).  In order
to use the locale stuff in C or C++, you need to call setlocale to set
the locale stuff up.

In C:

  #include <locale.h>
  setlocale(LC_ALL, "");

In C++:

  #include <locale>
  std::locale::global(std::locale(""));

The latter should imply the former, but I'm not totally convinced
(I've seen some odd problems when using C date functions which stopped
when I added a setlocale() call).

Just to confuse things further, in C++ it's possible to define your
own locale facets to customise this yourself.  Jossuttis' "The C++
Standard Library" will tell you how.


Regards,
Roger


- -- 
Roger Leigh
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