Qt-embedded-interest Archive, February 2007
A very strange problem about QString::number(double)
Message 1 in thread
My program is:
#include <QDebug>
int main()
{
qDebug()<<QString::number(3.14);
}
When I compile and run it on my KDE Desktop with qt 4.2.0ïit gives the
result:
"3.14"
However, when I cross compile and run it on my ARM board with
qtopia-core-opensource-4.2.2, it gives a completely wrong result:
"4.27698e+86"
What's the matter?
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Message 2 in thread
Kingsun Soong wrote:
> My program is:
>
> #include <QDebug>
> int main()
> {
> qDebug()<<QString::number(3.14);
> }
>
> When I compile and run it on my KDE Desktop with qt 4.2.0ïit gives the
> result:
>
> "3.14"
>
> However, when I cross compile and run it on my ARM board with
> qtopia-core-opensource-4.2.2, it gives a completely wrong result:
>
> "4.27698e+86"
>
> What's the matter?
>
Maybe you could try to reconfigure Qt with option -DQT_QLOCALE_USES_FCVT
set.
If that does not help, try to turn off optimization.
Just a guess.
Best,
Andre
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Message 3 in thread
Andre Haupt wrote:
> Kingsun Soong wrote:
>> My program is:
>>
>> #include <QDebug>
>> int main()
>> {
>> qDebug()<<QString::number(3.14);
>> }
>>
>> When I compile and run it on my KDE Desktop with qt 4.2.0ïit gives the
>> result:
>>
>> "3.14"
>>
>> However, when I cross compile and run it on my ARM board with
>> qtopia-core-opensource-4.2.2, it gives a completely wrong result:
>>
>> "4.27698e+86"
>>
>> What's the matter?
>>
> Maybe you could try to reconfigure Qt with option -DQT_QLOCALE_USES_FCVT
> set.
> If that does not help, try to turn off optimization.
>
> Just a guess.
>
>
> Best,
>
> Andre
>
>
> To unsubscribe - send "unsubscribe" in the subject to
> qt-embedded-interest-request@xxxxxxxxxxxxx
It works! Thank you so much! The problem has troubled me for three days. I
googled it but got no luck. I compiled all these things with soft-float
library but still got no luck. Almost despaired! When I posted it here, by
no means can I imagine that the right answer will come to me just in one
hour! I really appreciate it!
To unsubscribe - send "unsubscribe" in the subject to qt-embedded-interest-request@xxxxxxxxxxxxx
Message 4 in thread
Kingsun Soong wrote:
> Andre Haupt wrote:
>
>
>> Kingsun Soong wrote:
>>
>>> My program is:
>>>
>>> #include <QDebug>
>>> int main()
>>> {
>>> qDebug()<<QString::number(3.14);
>>> }
>>>
>>> When I compile and run it on my KDE Desktop with qt 4.2.0ïit gives the
>>> result:
>>>
>>> "3.14"
>>>
>>> However, when I cross compile and run it on my ARM board with
>>> qtopia-core-opensource-4.2.2, it gives a completely wrong result:
>>>
>>> "4.27698e+86"
>>>
>>> What's the matter?
>>>
>>>
>> Maybe you could try to reconfigure Qt with option -DQT_QLOCALE_USES_FCVT
>> set.
>> If that does not help, try to turn off optimization.
>>
>> Just a guess.
>>
>>
>> Best,
>>
>> Andre
>>
>>
>> To unsubscribe - send "unsubscribe" in the subject to
>> qt-embedded-interest-request@xxxxxxxxxxxxx
>>
>
> It works! Thank you so much! The problem has troubled me for three days. I
> googled it but got no luck. I compiled all these things with soft-float
> library but still got no luck. Almost despaired! When I posted it here, by
> no means can I imagine that the right answer will come to me just in one
> hour! I really appreciate it!
>
>
Nice to hear ;-)
Best,
Andre
To unsubscribe - send "unsubscribe" in the subject to qt-embedded-interest-request@xxxxxxxxxxxxx
