/* nag_poisson_dist (g01bkc) Example Program.
 *
 * Copyright 1996 Numerical Algorithms Group.
 *
 * Mark 4, 1996.
 *
 */

#include <nag.h>
#include <nagx04.h>
#include <nag_stdlib.h>
#include <stdio.h>
#include <nagg01.h>

int main(int argc, char *argv[])
{
  FILE     *fpin, *fpout;
  Integer  exit_status = 0;
  Integer  k;
  double   plek, peqk, pgtk;
  double   rlamda;
  NagError fail;

  INIT_FAIL(fail);

  /* Check for command-line IO options */
  fpin = nag_example_file_io(argc, argv, "-data", NULL);
  fpout = nag_example_file_io(argc, argv, "-results", NULL);

  fprintf(fpout, "nag_poisson_dist (g01bkc) Example Program Results\n");

  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n] ");
  fprintf(fpout, "\n    rlamda     k     plek      pgtk      peqk\n\n");

  while ((fscanf(fpin, "%lf %ld%*[^\n] ", &rlamda, &k)) != EOF)
    {
      /* nag_poisson_dist (g01bkc).
       * Poisson distribution function
       */
      nag_poisson_dist(rlamda, k, &plek, &pgtk, &peqk, &fail);
      if (fail.code != NE_NOERROR)
        {
          fprintf(fpout, "Error from nag_poisson_dist (g01bkc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      fprintf(fpout, " %10.3f%6ld%10.5f%10.5f%10.5f\n", rlamda, k, plek,
              pgtk, peqk);
    }

 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  return exit_status;
}