Science Memes

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157

Equality (ro-che.info)

submitted 4 months ago* (last edited 4 months ago) by [email protected] to c/[email protected]

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[–] [email protected] 42 points 4 months ago (2 children)

Actually we don't know whether 2+3 equals to 3+2 without seeing the definition of the + operator

[–] [email protected] 37 points 4 months ago* (last edited 4 months ago)

1 x 0 = 0

And

2 x 0 = 0

Then 1 = 2.

And this folks is why you don’t hire “math teachers” because he was a successful football coach. It took him way too long to realize this is why we don’t divide by zero, (more than a week, actually.)

[–] [email protected] 16 points 4 months ago (3 children)

Fun fact: C doesn't even guarantee a + b == a + b

[–] [email protected] 2 points 4 months ago

C doesn't even guarantee a == a

[–] [email protected] 2 points 4 months ago (1 children)

That's decidedly unfun and headhurty for those of us less mathemstically inclined. Also so deep into the theoretical weeds that I'm not sure that "fact" applies..

[–] [email protected] 6 points 4 months ago* (last edited 4 months ago)

One night I dreamt about the new C standard. It was a tome of ten thousand pages, in dense, tiny, font, three columns of text on each page, and it was all headings and sub-headings interspersed with nothing but either "undefined" or "implementation-defined".

[–] [email protected] 15 points 4 months ago (1 children)

*If a and b are float

[–] [email protected] 5 points 4 months ago* (last edited 4 months ago)

Or signed integers because overflow is undefined. It could do the left-hand computation in two's complement and the right hand in sign-magnitude, leading to different results. Or, as it's undefined, it could brew you some coffee and serve it with an aspirin.