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2s complement

 
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victorf



Joined: 01 Jan 2006
Posts: 342
Location: Schenectady, New York
Posted: 25 June 2007, 19:05 PM    Post subject: 2s complement Reply with quote
Is there a cool way to find the 2s compliment of an UnsignedLong? The directions I have say invert all bits then add 1 to get the 2s compliment. What is the BEST Smile way do do this?

Any enlightenment will be appreciated.

Vic
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dkinzer
Site Admin


Joined: 03 Sep 2005
Posts: 2593
Location: Portland, OR
Posted: 25 June 2007, 20:08 PM    Post subject: Re: 2s complement Reply with quote
victorf wrote:
Is there a cool way to find the 2s compliment of an UnsignedLong?
Most modern computers represent negative numbers using the two's complement system. Consequently, you can usually perform a two's complement operation simply by taking the negative of a value. The ZBasic compiler allows negation of unsigned operands so that would be the most expeditious way to achieve your objective.
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