[Qt-interest] Interaction between QApplication and swscanf

[Thiago Macieira]

Em Quinta-feira 10. Setembro 2009, às 12.19.48, você escreveu:
> I have strange behaviour with the swscanf function in my QT programs : This
> function always returns 0 when a QApplication is declared ...

> float val;
> 
> wchar_t wStr[] = L"0.98";
> 
> swscanf( wStr, L"%f", &val );
> 
> return val;
> 
> }

The reason is that QApplication calls setlocale(3). That changes your libc's 
locale (so that the system produces proper locale strings and translated 
messages).

That also means your decimal separator changed from . to ,

You should use a function that is locale-independent if you're parsing locale-
independent data.

-- 
Thiago Macieira - thiago.macieira (AT) nokia.com
  Senior Product Manager - Nokia, Qt Development Frameworks
     Sandakerveien 116, NO-0402 Oslo, Norway

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