Re: Mod (%) function in C/Objective-C?
Re: Mod (%) function in C/Objective-C?
- Subject: Re: Mod (%) function in C/Objective-C?
- From: Keary Suska <email@hidden>
- Date: Tue, 12 Aug 2014 18:38:09 -0600
On Aug 12, 2014, at 10:17 AM, Dave <email@hidden> wrote:
>
> On 12 Aug 2014, at 17:11, Scott Ribe <email@hidden> wrote:
>
>> On Aug 12, 2014, at 10:01 AM, Dave <email@hidden> wrote:
>>
>>> I’m not sure what you mean by dividing by a negative number is undefined?
>>
>> It sure as hell better be defined, hadn't it? We wouldn't want a language where the basic math ops were that foobar'd!
>>
>> Now in K&R C, the direction of truncation was undefined for division with negative integers, but C99 fixed that.
>>
>
> Yes, I saw that from the digging I did, I think that’s what he meant.
Yes, that--I didn't realize that C99 fixed that as well. I just figured reasonable compilers handled it reasonably ;-) Although I thought there was still some issue with modulus implementations, but I don't recall exactly. Probably also old information.
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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