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Thanks for the hint, it returns:
2 The system cannot find the file specified. ERROR_FILE_NOT_FOUND
But why does the exact same code work within the dos box application? How do I have to specify...

Hi all,

I am trying to access ports via the giveio.sys driver but I can't even open it.
In Visual C++ I built a normal Dos Box application and the routine ran fine but when I use the same stuff...

Yes, thanks for all your answers! It is clear to me now that there is no other solution than to stick with the rounding and range / tolerance test for comparing doubles.
Thanks again to all of you!

Thanks Dave!

I thought there might be some trick how to circumvent having to deal with these small deviations since that accuracy is not needed. It's pretty awkward to always use rounding and do...

p.s.: I am rounding so often that it really is an efficiency issue for the program. That's why I am concerned with this question.

Thanks for the hint, Dave!

I used the values which the visual c++ debugger gives in its watches but those are obviously not accurate enough. Using print I indeed got:
x =...

Hi there!

I have a problem with an algorithm I wrote: I must use double representation for the values but different sequences of arithmetic operations which are supposed to result in equal numbers...