Subject:
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Re: variables and spybot
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Newsgroups:
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lugnet.robotics.spybotics
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Date:
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Mon, 9 Sep 2002 18:13:56 GMT
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Viewed:
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5196 times
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In lugnet.robotics.spybotics, John Hansen writes:
> The other syntax I used was += and -= which are the most optimal means for
> writing n = n + something or n = n - something. There are also *=, /=, |=,
> and &=.
Something tricky about MindScript is the way it handles whitespace around
certain things. I just noticed that I had written:
n^= 0
in my program. For a minute or two I was thinking that was using a ^=
operator on the variable n. But there isn't a ^= operator (which might
mean, if it existed, not-equals or exclusive-or-equals). The MindScript
compiler interprets all of the following identically:
n ^= 0
n ^ = 0
n^ = 0
n^= 0
n^=0
which compiles to:
set 36,-1,2,0
set 36,-1,2,0
set 36,-1,2,0
set 36,-1,2,0
set 36,-1,2,0
So be careful with your carets.
If you are interested in seeing the compiler output, by the way, you can add
-TRACE=15 to the Addition Switches via the Preferences dialog and then
examine the contents of the file vpbtrace.txt in the VPBrick2 subdirectory
under the Mindstorms SDK.
John Hansen
http://members.aol.com/johnbinder/bricxcc.htm
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Message is in Reply To:
 | | Re: variables and spybot
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| (...) For reasons unknown to me the designers of MindScript decided to use array property notation much like that used in Delphi to implement various features in the Spybot firmware. world should not be thought of as a subroutine. It is a (...) (22 years ago, 9-Sep-02, to lugnet.robotics.spybotics)
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