Overflow errors without climits library

Question

I was working on a programming problem, is there a way to check for overflow errors for a signed 32-bit integer without the use INT_MIN and INT_MAX macros of climits.

Possible duplicate of [Detecting signed overflow in C/C++](https://stackoverflow.com/questions/3944505/detecting-signed-overflow-in-c-c) — BeyelerStudios, Sep 07 '18 at 07:15

score 2 · Answer 1 · answered Sep 07 '18 at 07:05

It's impossible to check for overflow errors using any technique. That's because the behaviour of signed int overflow is undefined in C++.

What you can do is write pre-emptive code that detects a potential overflow. The nature of that code is contingent on the operations you are performing. But it would be rather difficult to do that without using std::numeric_limits<int> functionality (which supersedes INT_MIN and INT_MAX) if you want to write portable C++.

Overflow errors without climits library

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