[Qt-interest] I am facing a problem

[Sujan Dasmahapatra]

I am reading an int and a double from file. Can u tell me how could I check
whether it's an int or double.

something like


*int intval;*
*double doubleval;*
**
*file >> intval  >> doubleval;*
**
*// Now I want to check whether it's an int or a junk value and whether it's
a double or a junk value !!!!!*
*How can I check that.*
**
*It's a C++ question but is there anythin in Qt  to check the data type ???*

On Wed, Aug 12, 2009 at 5:35 PM, Srdjan Todorovic <
todorovic.s at googlemail.com> wrote:

> Hi,
>
> On 12/08/2009, Sujan Dasmahapatra <sujan.dasmahapatra at gmail.com> wrote:
> >
> ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
> > int numberOfPoints = 201;
> > QString testNumberOfPoints = QString::number(numberOfPoints);
> >  for(i=0; i<testNumberOfPoints.length(); i++)
> >         {
> >                 qDebug() << testNumberOfPoints.at(i) << "\n";
> >                 if(testNumberOfPoints.at(i) != '0' ||
> > testNumberOfPoints.at(i) != '1' || testNumberOfPoints.at(i) != '2' ||
> > testNumberOfPoints.at(i) != '3' ||
> >                 testNumberOfPoints.at(i) != '4' ||
>  testNumberOfPoints.at(i)
> > != '5' ||  testNumberOfPoints.at(i) != '6' || testNumberOfPoints.at(i) !=
> > '7' ||
> >                 testNumberOfPoints.at(i) != '8' ||
> testNumberOfPoints.at(i)
> > != '9')
>
> You might get better performance if you did something like:
>
> if ( testNumberOfPoints.at(i) < 48 || testNumberOfPoints.at(i) >58)
> {
>  // display warning
> }
>
> This would require that at() returns an int or a char (i've not
> checked). But if you can somehow do an ASCII check, it may be faster.
>
> Srdjan
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>



-- 
Thanks & Regards
S. Dasmahapatra
B.E. (Aeronautics-Aerodynamics)
Bangalore, India
Ph:91-9900839788
Office:91-80-66470248
mail id : sujan.dasmahapatra at gmail.com
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