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Groups > comp.lang.c++ > #14807

Re: use of pointers

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On Wednesday, March 7, 2012 1:47:37 PM UTC, Juha Nieminen wrote:
> nick_keighley wrote:
> > or even better
> > 
> > inline double degreesToRadians (double d)
> > {
> >   return d * M_PI / 180.0;
> > }
> 
>   The compiler will most probably not replace "M_PI / 180.0" with its
> result at compile time in the above expression, unless you specifically
> set optimizations that allow it (eg. -ffast-math). If you want to avoid
> the runtime division, do it like this:
> 
>     return d * (M_PI / 180.0);
> 
>   Now the compiler is allowed to do the division at compile time.
> (OTOH, you should not assume that all compilers will do that when
> dealing with floating point...)

inline double degreesToRadians (double d)
{
   const double radsPerDeg = M_PI / 180.0;
   return d * radsPerDeg;
}

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use of pointers ahso <ahso47@yahoo.com> - 2012-03-06 02:54 -0800
  Re: use of pointers Marcel Müller <news.5.maazl@spamgourmet.com> - 2012-03-06 12:22 +0100
    Re: use of pointers nick_keighley_nospam@hotmail.com - 2012-03-07 00:32 -0800
      Re: use of pointers Juha Nieminen <nospam@thanks.invalid> - 2012-03-07 13:47 +0000
        Re: use of pointers nick_keighley_nospam@hotmail.com - 2012-03-07 07:06 -0800
          Re: use of pointers Juha Nieminen <nospam@thanks.invalid> - 2012-03-07 16:04 +0000
  Re: use of pointers Juha Nieminen <nospam@thanks.invalid> - 2012-03-06 12:29 +0000
    Re: use of pointers Victor Bazarov <v.bazarov@comcast.invalid> - 2012-03-06 08:04 -0500
      Re: use of pointers glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-03-06 14:05 +0000
        Re: use of pointers Victor Bazarov <v.bazarov@comcast.invalid> - 2012-03-06 11:25 -0500
          Re: use of pointers glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-03-06 20:56 +0000
      Re: use of pointers SG <s.gesemann@gmail.com> - 2012-03-06 06:27 -0800
        Re: use of pointers BGB <cr88192@hotmail.com> - 2012-03-06 13:05 -0700
        Re: use of pointers woodbrian77@gmail.com - 2012-03-07 05:38 -0800
      Re: use of pointers Rui Maciel <rui.maciel@gmail.com> - 2012-03-07 15:48 +0000
        Re: use of pointers BGB <cr88192@hotmail.com> - 2012-03-07 18:38 -0700
          Re: use of pointers Pavel <pauldontspamtolk@removeyourself.dontspam.yahoo> - 2012-03-10 21:10 -0500
            Re: use of pointers Jeff Flinn <TriumphSprint2000@hotmail.com> - 2012-03-12 08:26 -0400
              Re: use of pointers Jeff Flinn <TriumphSprint2000@hotmail.com> - 2012-03-12 12:28 -0400
      Re: use of pointers Nobody <nobody@nowhere.com> - 2012-03-09 21:28 +0000
  Re: use of pointers Geoff <geoff@invalid.invalid> - 2012-03-06 21:31 -0800
    Re: use of pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-07 11:26 +0000
      Re: use of pointers yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-03-07 13:56 +0000
        Re: use of pointers Maarten <maarten.sneep@knmi.nl> - 2012-03-07 06:14 -0800
          Re: use of pointers Rui Maciel <rui.maciel@gmail.com> - 2012-03-07 16:05 +0000
            Re: use of pointers yatremblay@bel1lin202.(none) (Yannick Tremblay) - 2012-03-08 10:08 +0000
              Re: use of pointers Rui Maciel <rui.maciel@gmail.com> - 2012-03-08 21:17 +0000
            Re: use of pointers Maarten <maarten.sneep@knmi.nl> - 2012-03-08 04:55 -0800
          Re: use of pointers Nobody <nobody@nowhere.com> - 2012-03-09 21:45 +0000
        Re: use of pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-07 20:08 +0000
      Re: use of pointers Nobody <nobody@nowhere.com> - 2012-03-09 21:50 +0000
        Re: use of pointers Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-03-09 22:37 +0000
  Re: use of pointers Rui Maciel <rui.maciel@gmail.com> - 2012-03-07 15:37 +0000

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