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submitted 2 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 1 week ago (1 children)

what's the general rule for translating negatives from binary? did you just do like 17 - 2 • (-1) or something?

[–] [email protected] 4 points 1 week ago (1 children)

I used what known as 2's compliment. Take the complement (flip all the bits - here that would give you 01110 which is 14) then add 1.

[–] [email protected] 1 points 1 week ago (1 children)

thanks for the explanation! could you express it as a NOT operation plus one? like is that how it would be processed at a low level?

[–] [email protected] 2 points 1 week ago* (last edited 1 week ago)

My low level is a tad rusty from when I learned the C side in school, but if I recall the not operator resolves as a single Boolean (0 or 1 in true C), whereas compliment comes back as however many bits you put in - a not operation per bit.

In C, the not operator is ! and the compliment operator is ~