one time a CS professor took points off an assignment (build interpreting calculator in assembly) and I had to bring in my number theory textbook to demonstrate that it is in fact the C language that does division incorrectly

C either rounds towards 0 on integer division or maybe does something implementation specific if the denominator is negative?

anyway

the "correct" definition of integer / and % is:
a / b = x, a % b = r, where
a = bx + r
0 <= r < |b|

(remainder is always positive, which requires rounding towards negative infinity)

*math is made up and you can define division however you want, unless you want algebra to work, then there's some rules you gotta follow

Follow

@octopus Quality post and the last part is a good reminder.
Even if you like something, it's good and important to know the limits of it.

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