Re: [gtkmm] behavior modification of input/output functions

["Timothy M. Shead" <tshead k-3d com>]

Florent Teichteil wrote:
> Hi,
>
> I have a problem with input/output operations with gtkmm.
>
> I wrote this piece of code in a graphical application using gtkmm 2.2.1
> :
>
> double probability;
> printf("p = ");
> scanf("%lf", &probability);
> printf("\np = %lf\n", probability);
>
> 1) First test with 3.56 :
>
> p = 3.56
> p = 3,000000
>
> 2) Second test with 3,56 :
>
> p = 3,56
> p = 3,560000
>
> I was very surprised since I should obtain the opposite result.
>
> Indeed, the same piece of code in a console application returns the
> opposite results :
>
> 1) First test with 3.56 :
>
> p = 3.56
> p = 3.560000
>
>
> 2) Second test with 3,56 :
>
> p = 3,56
> p = 3,000000
>
> Therefore, I think that gtkmm modifies the behavior of the functions of
> <cstdio>. If so, how can I prevent this modification ?

I think it more likely that your first example is compiled in C++ and 
the second in C, I doubt that gtkmm is at fault.

Also suggest you look into using iostreams for I/O, unless you're 
working with legacy code.

Cheers,
Tim