Re: simple float/double question
Re: simple float/double question
- Subject: Re: simple float/double question
- From: Chris Ridd <email@hidden>
- Date: Fri, 30 May 2003 08:29:07 +0100
On 30/5/03 7:54 am, Lloyd Dupont <email@hidden> wrote:
>
how to test if a float/double is a number or not ?
>
I mean acos(2) for example return NaN, how to know programatically it's
>
NaN ?
Try isnan(). (It has a man page, and is ANSI C.)
The acos man page says you should use (the non-ANSI) matherr(3) to handle
exceptional cases, but there's no matherr man page :-(( [Bug raised]
Cheers,
Chris
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