/* nag_bessel_k0_scaled (s18ccc) Example Program.
 *
 * Copyright 1991 Numerical Algorithms Group.
 *
 * Mark 2 revised, 1992.
 */

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

int main(void)
{
  Integer  exit_status = 0;
  double   x, y;
  NagError fail;

  INIT_FAIL(fail);

  /* Skip heading in data file */
  scanf("%*[^\n]");
  printf("nag_bessel_k0_scaled (s18ccc) Example Program Results\n");
  printf("     x           y\n");
  while (scanf("%lf", &x) != EOF)
    {
      /* nag_bessel_k0_scaled (s18ccc).
       * Scaled modified Bessel function exp(x) K_0(x)
       */
      y = nag_bessel_k0_scaled(x, &fail);
      if (fail.code != NE_NOERROR)
        {
          printf("Error from nag_bessel_k0_scaled (s18ccc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      printf("%12.3e%12.3e\n", x, y);
    }

 END:
  return exit_status;
}