Re: cart2pol and external code interface

Thanks-
  I had gone to this documentation and it worked for the Matrix
manipulations.
  Apparently cart2pol is something different (A built-in function?
https://octave.sourceforge.io/octave/overview.html)

. There is a mysterious in(0) etc used in the call. We can guess what this
is but I cannot find any documentation for on the methods of the call.

Fritz

On Thu, Oct 14, 2021 at 11:59 AM Markus Mützel <[email protected]>
wrote:

> I'm assuming you would like to write a standalone program in C++ that
> calls Octave. Is this correct?
>
> If this is the case, take a look at appendix A.3 Standalone Programs of
> the Octave manual:
> Standalone Programs (GNU Octave (version 6.3.0))
> <https://octave.org/doc/v6.3.0/Standalone-Programs.html#Standalone-Programs>
>
> It includes an example that calls the Octave function "gcd".
> Calling "cart2pol" instead should work similarly.
>
> HTH
>
> Markus
>
> *Gesendet:* Donnerstag, 14. Oktober 2021 um 17:06 Uhr
> *Von:* "Fritz Sonnichsen" <[email protected]>
> *An:* [email protected]
> *Betreff:* cart2pol and external code interface
> I have octave running just fine on my ubuntu 16.xx machine. I also ran the
> octave demo program for calling octave from C++ (external code interface)
> and this did the Matrix algebra just fine.
>   Now I need to run "cart2pol"  but I get "  but I get the errors below:
> Any ideas appreciated
> Fritz
> ============ERROR MESSAGES =============================
> error: ‘cart2pol’ was not declared in this scope
>    cart2pol(1,1);
>    ^~~~~~~~
> ..../comp2: line 2: ./octpolar: No such file or directory
> ======== COMPLETE CODE ===============================
>
> /////////////////////////////////////////////////////////////////////////////////
> #include <stdio.h>
> #include <stdlib.h>
> #include <complex.h>
> #include <iostream>
> #include<math.h>
> #include <iostream>
>
> #include <octave/oct.h>
> int
> main (void)
> {
>   //float theta,rho;
>   cart2pol(1,1);
>   //std::cout << theta;
>   //std::cout << rho;
>   return 0;
> }
>
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