I have this code and it will not compile telling me that pow is
undefined. I'm not quite sure what to make of this so I thought I'd get some
feedback.

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

int
main (int argc, char *argv[])
{
if (argc != 3)
{
puts ("usage error");
exit (EXIT_FAILURE);
}
double x, y;
x = strtod (argv[1], NULL);
y = strtod (argv[2], NULL);
printf ("%.2f\n", Pow (x, y));
return 0;
}

The code looks fine to me. But there could be something quite apparent
that I'm missing. This while linking to the math library too.

Bill

On May 29, 3:54 am, "Bill Cunningham" <nos...@nspam.com> wrote:
> I have this code and it will not compile telling me that pow is
> undefined. I'm not quite sure what to make of this so I thought I'd get some
> feedback.
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
>
> int
> main (int argc, char *argv[])
> {
> if (argc != 3)
> {
> puts ("usage error");
> exit (EXIT_FAILURE);
> }
> double x, y;
> x = strtod (argv[1], NULL);
> y = strtod (argv[2], NULL);
> printf ("%.2f\n", Pow (x, y));
> return 0;
>
> }
>
> The code looks fine to me. But there could be something quite apparent
> that I'm missing. This while linking to the math library too.
It should tell you that 'Pow' is undefined, not 'pow'. C's identifiers
are case sensitive.

"Bill Cunningham" <nospam@nspam.com> writes:
> I have this code and it will not compile telling me that pow is
> undefined. I'm not quite sure what to make of this so I thought I'd get some
> feedback.
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>
>
> int
> main (int argc, char *argv[])
> {
> if (argc != 3)
> {
> puts ("usage error");
> exit (EXIT_FAILURE);
> }
> double x, y;
> x = strtod (argv[1], NULL);
> y = strtod (argv[2], NULL);
> printf ("%.2f\n", Pow (x, y));
> return 0;
> }
>
> The code looks fine to me. But there could be something quite apparent
> that I'm missing. This while linking to the math library too.

It's not telling you that "pow" is undefined.
It's telling you that "Pow" is undefined.

--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

<vippstar@gmail.com> wrote in message news:59d60972-bef7-4b5b-b9ea-> It
should tell you that 'Pow' is undefined, not 'pow'. C's identifiers
> are case sensitive.

It is. Oh silly me. Thanks. I hate uppercase. It must've been a typo.

Bill

"Keith Thompson" <kst-u@mib.org> wrote in message
news:ln1w3loqxd.fsf@nuthaus.mib.org...

> It's not telling you that "pow" is undefined.
> It's telling you that "Pow" is undefined.

> It is. Oh silly me. Thanks. I hate uppercase. It must've been a typo.

Bill

Bill Cunningham wrote:
> I have this code and it will not compile telling me that pow is
> undefined. I'm not quite sure what to make of this so I thought I'd get some
> feedback.
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <math.h>

Should be <Math.h>.

> int
> main (int argc, char *argv[])

Should be Int Main.

> {
> if (argc != 3)
> {
> puts ("usage error");

ITYM Puts.

> exit (EXIT_FAILURE);

ITYM Exit(exit_Failure);

> }
> double x, y;

Should be DOUBLE.

> x = strtod (argv[1], NULL);
> y = strtod (argv[2], NULL);

Should be StrtOD ... null in both instances.

> printf ("%.2f\n", Pow (x, y));

Should be Printf ... poW(...)

> return 0;

Should be Return Zero;

> }
>
> The code looks fine to me. But there could be something quite apparent
> that I'm missing. This while linking to the math library too.
>
> Bill

Glad to be of , bILL. Good-bye.

--
Eric Sosman
esosman@ieee-dot-org.invalid

On Thu, 29 May 2008 00:54:16 GMT, "Bill Cunningham" <nospam@nspam.com>
wrote:

> I have this code and it will not compile telling me that pow is
>undefined. I'm not quite sure what to make of this so I thought I'd get some
>feedback.

Since your code never references the pow function, it is unlikely that
that is what the error message says. Look at it again. Look at it
carefully. Remember, C is case sensitive. If you still have a
question, cut and paste the complete text of the error message in your
message to this newsgroup.

>
>#include <stdio.h>
>#include <stdlib.h>
>#include <math.h>
>
>int
>main (int argc, char *argv[])
>{
> if (argc != 3)
> {
> puts ("usage error");
> exit (EXIT_FAILURE);
> }
> double x, y;
> x = strtod (argv[1], NULL);
> y = strtod (argv[2], NULL);
> printf ("%.2f\n", Pow (x, y));
> return 0;
>}
>
> The code looks fine to me. But there could be something quite apparent
>that I'm missing. This while linking to the math library too.
>



Remove del for email

On Thu, 29 May 2008 02:26:47 +0100, Eric Sosman
<esosman@ieee-dot-org.invalid> wrote:
> Bill Cunningham wrote:
>> #include <math.h>
>
> Should be <Math.h>.
>
> ...
>
> Glad to be of , bILL. Good-bye.
>

Wouldn't it be more ful, and save you a lot of typing, if you simply
told the poster that he had used 'Pow' instead of 'pow' and that C is case
sensitive? Just like vippstar and Keith Thompson did.

--
Martin