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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.lang.c
Subject: Re: "undefined behavior"?
Date: Sat, 15 Jun 2024 07:03:16 +0200
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On 15.06.2024 06:45, DFS wrote:
> On 6/14/2024 11:56 PM, Keith Thompson wrote:
>> DFS <nospam@dfs.com> writes:
>>>
>>> After casting i to an int before any array addressing, // works.
>>
>> I'm surprised you needed to convert i to an int.  I would think that
>> just replacing nums[i/2] by nums[i//2] would do the trick,
>> as long as i always has an int value (note Python's dynamic typing).
>> If i is acquiring a float value, that's probably a bug, given the name.
> 
> I spotted the issue.  Just prior to using i for array addressing I said:
> i = N/2.
> 
> The fix is set i = int(N/2)

Given what Keith suggested, and assuming N is an integer, wouldn't it
be more sensible to use the int division operator '//' and just write
i = N // 2 ?  I mean, why do a float division on integer operands and
then again coerce the result to int again?

Janis