[Pkg-octave-devel] Re: Sparse + complex arithmetic inconsistency

David Bateman David.Bateman at motorola.com
Fri Mar 30 10:41:38 UTC 2007


Or a slightly modification

#include <math.h>
#include <complex.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
  complex double b=1,c=I*1,d = 1+I*1,z = 0.;
  // This should produce (inf,0), not (nan,nan).
  printf("(%f,%f) / (%f,%f) -> (%f,%f)\n",
         creal(b),cimag(b),creal(z),cimag(z),creal(b/z),cimag(b/z));
  // This should produce (0,inf), not (nan,nan).
  printf("(%f,%f) / (%f,%f) -> (%f,%f)\n",
         creal(c),cimag(c),creal(z),cimag(z),creal(c/z),cimag(c/z));
  // This should produce (inf,inf), not (nan,nan).
  printf("(%f,%f) / (%f,%f) -> (%f,%f)\n",
         creal(d),cimag(d),creal(z),cimag(z),creal(d/z),cimag(d/z));
  return 0;
}

that all return (nan,nan) for me.

D.

-- 
David Bateman                                David.Bateman at motorola.com
Motorola Labs - Paris                        +33 1 69 35 48 04 (Ph) 
Parc Les Algorithmes, Commune de St Aubin    +33 6 72 01 06 33 (Mob) 
91193 Gif-Sur-Yvette FRANCE                  +33 1 69 35 77 01 (Fax) 

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