Merlin Morgenstern wrote:
> Hello everybody,
> I am having trouble finding a logic for following problem:
> Should be true if:
> page = 1 OR page = 3, but it should also be true if page = 2 OR page = 3
> The result should never contain 1 AND 2 in the same time.
> This obviously does not work:
> (page = 1 OR page = 3) OR (page = 2 OR page = 3)
> This also does not work:
> (page = 1 OR page = 3 AND page != 2) OR (page = 2 OR page = 3 AND page
> != 1)
> Has somebody an idea how to solve this?
> Thank you in advance for any help!
Surely what you need is xor (exclusive-or)
I can't believe a programmer has never heard of that!
(page==1 XOR page==2) AND page==3
Peter Ford phone: 01580 893333
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