/* 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)
{
  Integer          exit_status = 0;
  Complex          z, cy[2];
  double           fnu;
  const Integer    n = 2;
  Integer          nz;
  Nag_ScaleResType scal;
  char             nag_enum_arg[40];
  NagError         fail;

  INIT_FAIL(fail);

  /* Skip heading in data file */
  scanf("%*[^\n]");
  printf("nag_complex_bessel_y (s17dcc) Example Program Results\n");
  printf("Calling with n = %ld\n", n);
  printf("   fnu           z              scal            cy[0]     "
          "        cy[1]      nz\n");
  while (scanf(" %lf (%lf,%lf) %s%*[^\n] ",
                &fnu, &z.re, &z.im, nag_enum_arg) != EOF)
    {
      /* Convert scal character to enum */
      scal = (Nag_ScaleResType) nag_enum_name_to_value(nag_enum_arg);

      /* 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, cy, &nz, &fail);
      if (fail.code != NE_NOERROR)
        {
          printf("Error from nag_complex_bessel_y (s17dcc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      printf("%7.4f (%7.3f,%7.3f) %-14s (%7.3f,%7.3f) (%7.3f,%7.3f) "
              "%ld\n", fnu, z.re, z.im, nag_enum_arg, cy[0].re,
              cy[0].im, cy[1].re, cy[1].im, nz);
    }

 END:

  return exit_status;
}