/* nag_complex_bessel_y (s17dcc) Example Program.
 *
 * Copyright 2002 Numerical Algorithms Group.
 *
 * Mark 7, 2002.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nags.h>

int main(void)
{
  Complex z, cy[2];
  double fnu;
  const Integer n = 2;
  Integer nz;
  Nag_ScaleResType scal_enum;
  char scal;

  Integer exit_status = EXIT_SUCCESS;
  NagError fail;

  INIT_FAIL(fail);

  /* Skip heading in data file */
  Vscanf("%*[^\n]");
  Vprintf("nag_complex_bessel_y (s17dcc) Example Program Results\n");
  Vprintf("Calling with n = %ld\n", n);
  Vprintf("   fnu           z         scal         cy[0]              cy[1]"
          "      nz\n");
  while (scanf(" %lf (%lf,%lf) '%c'%*[^\n] ", &fnu, &z.re, &z.im, &scal) != EOF)
    {
      /* Convert scal character to enum */
      if (scal == 's')
        {
          scal_enum = Nag_ScaleRes;
        }
      else if (scal == 'u')
        {
          scal_enum = Nag_UnscaleRes;
        }
      else
        {
          Vprintf("Unrecognised character for Nag_ScaleResType type\n");
          exit_status = -1;
          goto END;
        }
      /* nag_complex_bessel_y (s17dcc).
       * Bessel functions Y_(nu~+~a)(z), real a~>=~0, complex z,
       * nu~=~0~,~1~,~2~,~...
       */
      nag_complex_bessel_y(fnu, z, n, scal_enum, cy, &nz, &fail);
      if (fail.code == NE_NOERROR)
        Vprintf("%7.4f  (%7.3f,%7.3f)  '%c'  (%7.3f,%7.3f)  (%7.3f,%7.3f)  "
                "%ld\n", fnu, z.re, z.im, scal, cy[0].re, cy[0].im,
                cy[1].re, cy[1].im, nz);
      else
        {
          Vprintf("Error from nag_complex_bessel_y (s17dcc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
    }
 END:
  return exit_status;
}