/* nag_binomial_ci (g07aac) Example Program.
 *
 * Copyright 2001 Numerical Algorithms Group.
 *
 * Mark 7, 2001.
 */

#include <stdio.h>
#include <nag.h>
#include <nagx04.h>
#include <nag_stdlib.h>
#include <nagg07.h>

int main(int argc, char *argv[])
{
  FILE     *fpin, *fpout;

  /* Scalars */
  double   clevel, phat, pl, pu;
  Integer  exit_status = 0, k, n;
  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_binomial_ci (g07aac) Example Program Results\n");

  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n] ");

  fprintf(fpout, "\n");
  fprintf(fpout, " Probability    Confidence Interval\n");
  fprintf(fpout, "\n");
  while (fscanf(fpin, "%ld%ld%lf%*[^\n] ", &n, &k, &clevel) != EOF)
    {
      phat = (double) k / (double) n;
      /* nag_binomial_ci (g07aac).
       * Computes confidence interval for the parameter of a
       * binomial distribution
       */
      nag_binomial_ci(n, k, clevel, &pl, &pu, &fail);
      if (fail.code != NE_NOERROR)
        {
          fprintf(fpout, "Error from nag_binomial_ci (g07aac).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }

      fprintf(fpout, "%10.4f      ( %6.4f , %6.4f )\n", phat, pl, pu);
    }

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