If you are using C or C++, you need to be extremely careful with signed integers... | Hacker News

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		eru on Sept 24, 2020 \| parent \| context \| favorite \| on: Mathematics for Programmers [pdf] If you are using C or C++, you need to be extremely careful with signed integers, even when working modulo. Their overflow is undefined.

boston_clone on Sept 24, 2020 [–]

Is that due to the division taking place like the parent mentions, or something else?

eru on Sept 25, 2020 | [–]

Due to how C and C++ are defined in their standards.

The reason behind that is so that the compiler is allowed to assume that expressions like (x + 1 > x) are true, and thus can optimise more.

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