Re: round function

[Petr Vandrovec]

On  7 Mar 02 at 16:48, Ricardo Fabbri wrote:

> /*---------------------------------*/
> #include<math.h>
> #include<stdio.h>
> 
> main()
> {
>     printf("%f\n",round(4.5));
>     return 0;
> }
> /*---------------------------------*/
> 
> bash$ gcc -o tmp tmp.c -lm

You should use 'gcc -W -Wall -o tmp tmp.c -lm'. It will quickly reveal
that your code is a bit suboptimal. If you'll compile it with
'gcc -W -Wall -D_ISOC99_SOURCE -o tmp tmp.c -lm', it will work correctly.
round() prototype is available from math.h only if C99 (or GNU_SOURCE) 
is defined.
                                                Best regards,
                                                        Petr Vandrovec
                                                        address@hidden