Date: Fri, 8 Dec 1995 14:55:31 +0000 (GMT)
From: Andy Molyneux <molyneua AT cs DOT man DOT ac DOT uk>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: header file <math.h>

On 7 Dec 1995, Mark Lewis wrote:

> You need to link the math library to your executable to use math functions.
> Use the -lm flag at the END of your compile command line.
> 
> --
> ..--------------------------{ From:  Mark Lewis }--------------------------.
> |   Computing Services     |     http://www.city.ac.uk/~sl323/            |
> |   City University        |     PGP public key available by WWW, or by   |
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> `--------{ M DOT Lewis AT city DOT ac DOT uk (MIME) | nostra AT city DOT ac DOT uk (MIME) }---------'
> 
> THutchi141 AT aol DOT com wrote:
> [ stuff ]
> > #include <stdio.h>
> > #include <math.h>
> 
> > main()
> > {
> >      printf("%d\n",sin(3.0));
> > }
> 

You're also using the wrong format character to printf; it should be "%f" 
not "%d" ("%d" is for ints, whereas "sin" returns a double)

- Andy

| Andrew Molyneux            Internet: molyneua AT cs DOT man DOT ac DOT uk
| University of Manchester   Tel     : (+44)161-485-3291
| REAL programmers write  a=b!=4?b%2?c:d:e  without even
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