Cheers Matt,
Thanks for the input.
> This is undefined, as x is modified twice between sequence points[*].
> C99 (6.5p2) says:
Yes, I got that - as soon as the program flaked I realised where I'd gone awry.
It's just that I had "assumed" that bracing the post-increment "(x ++)" before
the & was applied would force an evaluation of x at that point, and would
therefore be one modification of x for one sequence point, with the & operation
another...
But of course that's *not* the way post-increment works. Oops, bother.
Oh well, it's working *correctly* now.
Anyway, I hope others can learn from my mistakes!
Cheers,
--
Ian
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