Re: why use pow(x, 2)?
Re: why use pow(x, 2)?
- Subject: Re: why use pow(x, 2)?
- From: Chunk 1978 <email@hidden>
- Date: Mon, 2 Nov 2009 14:15:18 -0500
ouf! dumbest question ever. please ignore.
On Mon, Nov 2, 2009 at 2:07 PM, Jens Alfke <email@hidden> wrote:
>
> On Nov 2, 2009, at 11:01 AM, Chunk 1978 wrote:
>
> why use this:
>>
>> float dist = pow(red - r, 2) + pow(green - g, 2) + pow(blue - b, 2);
>>
>> instead of:
>>
>> float dist = ((red - r) * 2) + ((green - g) * 2) + ((blue - b) * 2);
>>
>
> Um, "*" is multiplication, not exponentiation. Maybe you're thinking of the
> "**" operator found in some languages, though not in C :)
>
> —Jens
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