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|---|---|
| From | Willem <willem@toad.stack.nl> |
| Newsgroups | comp.lang.c |
| Subject | Re: behavior of || operator |
| Date | Fri, 7 Oct 2011 19:50:42 +0000 (UTC) |
| Organization | Stack Usenet News Service |
| Lines | 29 |
| Message-ID | <slrnj8um0i.tkv.willem@toad.stack.nl> (permalink) |
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Mark wrote:
) if ((action != ATTACH) || (action != DETACH))
) puts("invalid action");
It looks like you don't understand De Morgan's laws.
In English:
If action is not attach or action is not detach, then it is an invalid
action.
What you wanted to do is this:
If action is not attach or detach, then it is an invalid action.
Which is:
if (!(action == ATTACH || action == DETACH))
puts("invalid action");
Which, according to De Morgan, is equivalent to:
if ((action != ATTACH) && (action != DETACH))
puts("invalid action");
SaSW, Willem
--
Disclaimer: I am in no way responsible for any of the statements
made in the above text. For all I know I might be
drugged or something..
No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT
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behavior of || operator "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2011-10-07 13:13 -0400 Re: behavior of || operator James Kuyper <jameskuyper@verizon.net> - 2011-10-07 14:11 -0400 Re: behavior of || operator John Gordon <gordon@panix.com> - 2011-10-07 18:47 +0000 Re: behavior of || operator Willem <willem@toad.stack.nl> - 2011-10-07 19:50 +0000 Re: behavior of || operator Gene <gene.ressler@gmail.com> - 2011-10-08 13:58 -0700
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