/* nag_deviates_gamma_dist (g01ffc) Example Program.
 *
 * Copyright 1990 Numerical Algorithms Group.
 *
 * Mark 1, 1990.
 */

#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;
  double   a, b, p, g;
  double   tol = 0.0;
  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);
  /* Skip heading in data file */
  fscanf(fpin, "%*[^\n]");
  fprintf(fpout, "nag_deviates_gamma_dist (g01ffc) Example Program Results\n");
  fprintf(fpout, "    p       a       b           g\n\n");
  while (fscanf(fpin, "%lf %lf %lf", &p, &a, &b) != EOF)
    {
      /* nag_deviates_gamma_dist (g01ffc).
       * Deviates for the gamma distribution
       */
      g = nag_deviates_gamma_dist(p, a, b, tol, &fail);
      if (fail.code != NE_NOERROR)
        {
          fprintf(fpout, "Error from nag_deviates_gamma_dist (g01ffc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      fprintf(fpout, "%8.3f%8.3f%8.3f%10.3f\n", p, a, b, g);
    }

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