c++ - Can I make sure that no exception happens on overflow integer miltiplication? -


I am writing a code that makes some arithmetic over long values ​​and it can not produce overflow exceptions.

The code needs to be compiled on both Windows (Visual Studio) and Linux (ARM Linux).

Is there a program or compilation of time instructions, which I can use to compile it should not generate an overflow exception for that specific code

The main point is:

1- It works both on Windows and Linux

2- Despite the general configuration of the project, this section should not be overflow exception (hence Setting up a parameter in the project That is not the best solution).

I do not know about any of the implementations which generate an overflow exception for expression with integral types Will do But the question is what do you want to do? I know that all Windows and Linux compilers will give wrong results, and I can not think of a situation where it would be better for any option

the beginning of calculations Prior to this, the general way of handling this type of problem is by using pre-condition check. You know the calculations that are being made, so you can determine the range of values ​​that can be controlled safely without overflow, and you confirm the input that in that range before the start is.

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