Perhaps you need to read up on how the C language

No - really not at all. I am simply terribly involved with other stuff, which is why I appreciate such quick pointers from your side very much.

As that article that was linked to earlier in this thread showed
through experimentation, not very accurate.

Well - of course according to my requirements and not in general. Once I have checked that I will report back.

One last thing: Despite including <unistd.h> it tells me "usleep was not declared in this scope".

Is C++ involved?

Yes, it is. Can you tell what to be done ?

Thanks again and best regards

-- A l e x