/* nag_ranks_and_scores (g01dhc) Example Program.
 *
 * Copyright 1996 Numerical Algorithms Group.
 *
 * Mark 4, 1996.
 * Mark 8 revised, 2004.
 *
 */

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

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

  Integer  exit_status = 0, i, n;
  NagError fail;
  double   *r = 0, *x = 0;

  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_ranks_and_scores (g01dhc) Example Program Results\n\n");

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

  fscanf(fpin, "%ld ", &n);
  if (n >= 1)
    {
      if (!(r = NAG_ALLOC(n, double)) ||
          !(x = NAG_ALLOC(n, double)))
        {
          fprintf(fpout, "Allocation failure\n");
          exit_status = -1;
          goto END;
        }
    }
  else
    {
      fprintf(fpout, "Invalid n.\n");
      exit_status = 1;
      return exit_status;
    }
  for (i = 1; i <= n; ++i)
    fscanf(fpin, "%lf ", &x[i - 1]);

  /* nag_ranks_and_scores (g01dhc).
   * Ranks, Normal scores, approximate Normal scores or
   * exponential (Savage) scores
   */
  nag_ranks_and_scores(Nag_SavageScores, Nag_AverageTies, n, x, r,
                       &fail);
  if (fail.code != NE_NOERROR)
    {
      fprintf(fpout, "Error from nag_ranks_and_scores (g01dhc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  fprintf(fpout, "The Savage Scores : \n");
  fprintf(fpout, "  (Average scores are used for tied observations)\n\n");
  for (i = 1; i <= n; ++i)
    fprintf(fpout, "%10.4f\n", r[i - 1]);
 END:
  if (fpin != stdin) fclose(fpin);
  if (fpout != stdout) fclose(fpout);
  if (r) NAG_FREE(r);
  if (x) NAG_FREE(x);
  return exit_status;
}