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From: Bonita Montero <Bonita.Montero@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: What is your opinion about unsigned int u = -2 ?
Date: Sun, 4 Aug 2024 18:16:02 +0200
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Am 01.08.2024 um 08:34 schrieb Blue-Maned_Hawk:
> Thiago Adams wrote:
> 
>> What is your opinion about this:
>>
>> unsigned int u1 = -1;
>>
>> Generally -1 is used to get the maximum value.
>> Is this guaranteed to work?
> 
> Whether or not it is, i would prefer to use the UINT_MAX macro to make the
> code clearer.
>   
>> How about this one?
>>
>> unsigned int u2 = -2;
>> Does it makes sense? Maybe a warning here?
> 
> I cannot think of any situations where that would make sense, but i also
> cannot guarantee that there are not any.

With ...
	u &= -2;
.... you reset the lowest bit.

Similar with ...
	u &= -256;
.... you reset the lowest eight bits.