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#1
August 24th, 2000, 11:49 AM
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why is the complement of 6 = 11111010?
i understand how to get the figure, but not why i get that figure ***this is straight from my text, so it is right URL
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#2
August 31st, 2000, 03:42 AM
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How two's complement works:
Take positive number as binary value Subtract 1 from it Flip the bits Thus, 6 goes: 6: 00000110 6-1: 00000101 flip: 11111010 The reasons for this are pretty arbitrary -- two's complement is an entirely artificial system for representing a negative number that's just used because it has some useful properties, namely: 1) You get as many negative as positive numbers 2) It's simple 3) Every positive number has a negative equivalent in the same number of bits (a stricter version of (1), really). There are probably several other reasons for it that I haven't thought off of the top of my head. Just out of interest, why do you need to know about two's complement for 'Beginner' web work? :-)
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