math.h

math.h

[Tom Filley]

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I recently took up learning C and had a problem 
when trying to compile a program that called the pow() function and the sqrt() 
function. I thought those functions should have been in the math.h header file. 
My programs worked with the Microsoft compiler, but I would prefer 
to write programs for Linux. I have 3 computers with 3 different versions 
of Linux installed, but none of them have the math functions that I need (or 
that I know of at least). I have the versions of gcc that were included with 
Redhat 6.0, Redhat 6.1, and Mandrake 6.0. I was wondering if there is a new 
math.h file that I can download somewhere. If you know, please send me a link to 
it.
 
Thanks much,
        Tom 
Filley
        tafilley@home.com
 

math.h

[Tom Filley]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 783 bytes --]

I recently took up learning C and had a problem 
when trying to compile a program that called the pow() function and the sqrt() 
function. I thought those functions should have been in the math.h header file. 
My programs worked with the Microsoft compiler, but I would prefer 
to write programs for Linux. I have 3 computers with 3 different versions 
of Linux installed, but none of them have the math functions that I need (or 
that I know of at least). I have the versions of gcc that were included with 
Redhat 6.0, Redhat 6.1, and Mandrake 6.0. I was wondering if there is a new 
math.h file that I can download somewhere. If you know, please send me a link to 
it.
 
Thanks much,
        Tom 
Filley
        tafilley@home.com
 

Re: math.h

[Leopold Palomo-Avellaneda]

Maybe I don't understand the question but you need only to add 

#include <math.h>

and link with the -lm

Leo



A Dimarts 05 Abril 2005 11:01, John Poma va escriure:
> Hello,
>
> Please, in which include file may I find the mathematical functions such
> sin, cos, pow, sqrt, etc.
>
> Thanks a lot for your help.
> Best regards.
>
> John Poma

-- 
--
Linux User 152692
Catalonia

math.h

[John Poma]

Hello,

Please, in which include file may I find the mathematical functions such 
sin, cos, pow, sqrt, etc.

Thanks a lot for your help.
Best regards.

John Poma

Re: math.h

[Arthur Gold]

"Dennis J. Sylvester" wrote:
> 
> I tried using the sqrt() function with gcc and get an error : undefined
> reference to 'sqrt'.  If I compile with g++ I have no problem.  I get
> the same result when trying to use pow() also.  What am I missing?
> 
> Any help would be appreciated.
> 
> Dennis
Add the option -lm to your command line when you compile.
</rant on>
...and read the FAQs...and the docs...it's all in there...in fact if you
LOOK, this has probably been covered at least twice this week on this
and similar newsgroups...
</rant off>

HTH,
--ag
-- 
Artie Gold, Austin, TX
mailto:agold@bga.com or mailto:agold@cs.utexas.edu
--
Pet peeve: "its" = belonging or pertaining to "it" | "it's" = "it is"

Re: math.h

[Maurizio Loreti]

"Dennis J. Sylvester" <dsylvest@primenet.com> writes:

> I tried using the sqrt() function with gcc and get an error : undefined
> reference to 'sqrt'.

Did you link the math library?  I mean, did you type "-lm", like in

gcc -ansi -pedantic -Wall -o foo foo.c -lm

?`

-- 
Maurizio Loreti                         http://www.pd.infn.it/~loreti/mlo.html
Univ. of Padova, Dept. of Physics - Padova, Italy            loreti@pd.infn.it

math.h

[Dennis J. Sylvester]

I tried using the sqrt() function with gcc and get an error : undefined
reference to 'sqrt'.  If I compile with g++ I have no problem.  I get
the same result when trying to use pow() also.  What am I missing?

Any help would be appreciated.

Dennis

Re: math.h

[Maurizio Loreti]

"Dennis J. Sylvester" <dsylvest@primenet.com> writes:

> I tried using the sqrt() function with gcc and get an error : undefined
> reference to 'sqrt'.

Did you link the math library?  I mean, did you type "-lm", like in

gcc -ansi -pedantic -Wall -o foo foo.c -lm

?`

-- 
Maurizio Loreti                         http://www.pd.infn.it/~loreti/mlo.html
Univ. of Padova, Dept. of Physics - Padova, Italy            loreti@pd.infn.it

Re: math.h

[Arthur Gold]

"Dennis J. Sylvester" wrote:
> 
> I tried using the sqrt() function with gcc and get an error : undefined
> reference to 'sqrt'.  If I compile with g++ I have no problem.  I get
> the same result when trying to use pow() also.  What am I missing?
> 
> Any help would be appreciated.
> 
> Dennis
Add the option -lm to your command line when you compile.
</rant on>
...and read the FAQs...and the docs...it's all in there...in fact if you
LOOK, this has probably been covered at least twice this week on this
and similar newsgroups...
</rant off>

HTH,
--ag
-- 
Artie Gold, Austin, TX
mailto:agold@bga.com or mailto:agold@cs.utexas.edu
--
Pet peeve: "its" = belonging or pertaining to "it" | "it's" = "it is"

math.h

[Dennis J. Sylvester]

I tried using the sqrt() function with gcc and get an error : undefined
reference to 'sqrt'.  If I compile with g++ I have no problem.  I get
the same result when trying to use pow() also.  What am I missing?

Any help would be appreciated.

Dennis