 Another C Question |
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 Jan 24 2005, 12:48 AM
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#11
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Engineer  Group: Members Posts: 78 Joined: 25-July 04 From: China Member No.: 204  |
Now I can give the correct one:
X==~(-X)+1  QUOTE(osknockout @ Jan 23 2005, 06:29 PM) Hmm...
00000010 x 11111101 ~x 11111110 (~x)+1 11111110 ((~x)+1)|x 00000010 == 11111110? I'll think about that formula again...  |
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Jan 25 2005, 11:02 PM
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#12
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Super Member Group: Members Posts: 399 Joined: 14-November 04 From: Elysium Member No.: 2,280 |
QUOTE Now I can give the correct one: X==~(-X)+1 Hmm.... 00000100 x 10000100 -x //Randall Hyde, art of assembly, signed numbers 01111011 ~(-x) 01111100 ~(-X)+1 01111100==00000100? Yomi, stop guessing  I think that works for 2 though. |
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Jan 26 2005, 04:35 AM
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#13
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Engineer Group: Members Posts: 78 Joined: 25-July 04 From: China Member No.: 204 |
-x, pls note,
00000100 x 11111100 -x -x is (~x)+1, they are equal. -x is not simply change the fist bit. Sure I am not guessing, I have point out I have given the CORRECT one. QUOTE(osknockout @ Jan 25 2005, 11:02 PM) Hmm....
00000100 x 10000100 -x //Randall Hyde, art of assembly, signed numbers 01111011 ~(-x) 01111100 ~(-X)+1 01111100==00000100? Yomi, stop guessing I think that works for 2 though. |
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