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negative numbers

Hung Tang
Ranch Hand

Joined: Feb 14, 2002
Posts: 148
How do you write a negative number in binary form? Say -1 is 11111111 but how?? What would be -125 in binary? And can anyone determine what 5>>38023 would be?
Valentin Crettaz
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Joined: Aug 26, 2001
Posts: 7610
Here is a good post dealing with that:

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Corey McGlone
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Joined: Dec 20, 2001
Posts: 3271
Originally posted by Hung Tang:
And can anyone determine what 5>>38023 would be?

Short answer, do a search for bit operations in the forum - you'll find a ton.
Slightly longer answer, when shifting by a value greater than the number of bits in the value you're shifting, take that value and mod it by the size of the value you're shifting.
For example:


SCJP Tipline, etc.
I agree. Here's the link:
subject: negative numbers
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