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Re: Accurate decimal numbers?

Subject: Re: Accurate decimal numbers?
From: John Stiles <email@hidden>
Date: Fri, 31 Dec 2004 17:08:38 -0800
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On Dec 31, 2004, at 4:42 PM, Brendan Younger wrote:

Avoiding int<->float conversions is always best. I'd suggest if(0.0 == fabs(x - rint(x)), but I don't claim to be the expert on this.

If you're going to compare against zero, why use absolute value?
0 == -0.
I'd probably use "floor(x) == x"; since it makes a function call, it's not the fastest technique possible, but the intent is crystal clear and in 99.9% of cases, that's more important.
(After dropping the fabs and algebraic simplification, your version is just "rint(x) == x", basically the same thing.)

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References:
	>Accurate decimal numbers? (From: Mark Dawson <email@hidden>)
	>Re: Accurate decimal numbers? (From: Brendan Younger <email@hidden>)

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