Subject:
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Re: What I learned @ the robot meet
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Wed, 28 Feb 2001 17:12:56 GMT
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Viewed:
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467 times
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Rebel Transcanner wrote:
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> "Chris Magno" <cmagno@home.com> wrote in message
> news:3A900923.7A053E68@home.com...
>
> > What lego related stuff did you learn at the event.
>
> One of the things I learned (which shocked me) about programming:
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> OnFwd(OUT_B+OUT_B)
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> does NOT just turn on (forward) output B. It will turn on output B *AND* C.
> SHOCKED. That's messed up!
Actually, I think it will just turn on output C, and leave B on if
it was already. A much better way to write this sort of thing, in
general, is to use the bitwise OR operator instead of addition. Then
that kind of mistake can't happen:
OnFwd(OUT_B | OUT_B);
I can go into the math of this if anyone cares; otherwise, I think NQC
supports '|', so use it in good health!
Jeff
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Message is in Reply To:
 | | Re: What I learned @ the robot meet
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| "Chris Magno" <cmagno@home.com> wrote in message news:3A900923.7A053E...ome.com... (...) One of the things I learned (which shocked me) about programming: OnFwd(OUT_B+OUT_B) does NOT just turn on (forward) output B. It will turn on output B *AND* (...) (24 years ago, 18-Feb-01, to lugnet.org.ca.rtltoronto)
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