Re: [Mingw-msys] pow(5,2)=24 ?????!!!!!

[Michael C. <van...@gm...>]

So I should always add 0.5 to pow() and modf() as shown, when my input
parameters and output are all integers?

double modf(double, double *);

Michael Chen




On 9/7/07, Norman Vine <nh...@ca...> wrote:
> Michael Chen writes:
> > Sent: Friday, September 07, 2007 4:38 PM
> > To: MSYS Discussion List
> > Subject: Re: [Mingw-msys] pow(5,2)=24 ?????!!!!!
> >
> >   int s = (int) pow(l,d);
> >   printf("%d\t%d\t%d\n",l,d,s);
> >
> >
> > And I tried several (l,d), results are:
> > 2 2 4
> > 3 2 9
> > 4 2 16
> > 5 2 24  <= this one is wrong
> > 6 2 36
> > ....
> >
> > What shall I use then? my variable s, l, and d are integers!
>
>
> int s = (int)( pow(l,d) + 0.5);
>
> More then you will probably ever need to know
> http://docs.sun.com/source/806-3568/ncg_goldberg.html
>
> HTH
>
> Norman
>
>
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-- 
Michael Chen
PhD Candidate
Northwestern University
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