From: pv AT cs DOT montana DOT edu (Paul Peavyhouse)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: sin & cos functions?
Date: Wed, 12 Mar 97 19:26:51 GMT
Organization: Montana State University
Lines: 48
Message-ID: <5g7oms$abl@netra.montana.edu>
References: <331E6B93 DOT 3B63 AT comports DOT com> <857645423 DOT 321128 AT red DOT parallax DOT co DOT uk>
NNTP-Posting-Host: esus.cs.montana.edu
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <857645423 DOT 321128 AT red DOT parallax DOT co DOT uk>, johne AT parallax DOT co DOT uk (John Eccleston) wrote:
>In article <331E6B93 DOT 3B63 AT comports DOT com>, j AT comports DOT com wrote:
>Try the standard C header math.h which defines quite a few trigonometric
>and other functions.  Note that the trigonometric functions work on
>radians not degrees!
>
>-----> Cut Here <-----
>#include <stdio.h>
>#include <math.h>
>
>float degreesToRadians(float angle)
>{
>   return angle * (PI / 180);
>}
>
>main()
>{
>   printf("Sin of 45: %f\n", sin(degreesToRadians(45))); 
>}
>-----> CUT HERE <-----

        Don't get me wrong, I'm not ragging anyone, nor their code, but from 
one fellow programmer to another, why did you choose to not write the above 
code as:

#include <stdio.h>
#include <math.h>

#define RAD(deg)        ( ( deg ) * ( 2 * M_PI ) / 360.0 )

main()
{
   printf("Sin of 45: %f\n", sin(RAD(45))); 
}

        I am more interested in the observation that some people prefer to do 
things the hard way, as opposed to giving simpler examples.  This is a 
philosophical argument, not a programming one.

                                                        PV


______________________________________________________________________________

 Paul Peavyhouse                          
 http://www.cs.montana.edu/~pv           
 email: pv AT cs DOT montana DOT edu                
______________________________________________________________________________