/* nag_prob_chi_sq (g01ecc) Example Program.
 *
 * Copyright 2014 Numerical Algorithms Group.
 *
 * Mark 1, 1990.
 */

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

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

  INIT_FAIL(fail);

  /* Skip heading in data file */
  scanf("%*[^\n]");
  printf("nag_prob_chi_sq (g01ecc) Example Program Results\n");
  printf("  x      df     prob\n\n");
  while (scanf("%lf %lf", &x, &df) != EOF)
    {
      /* nag_prob_chi_sq (g01ecc).
       * Probabilities for chi^2 distribution
       */
      prob = nag_prob_chi_sq(Nag_LowerTail, x, df, &fail);
      if (fail.code != NE_NOERROR)
        {
          printf("Error from nag_prob_chi_sq (g01ecc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }
      printf("%6.3f%8.3f%8.4f\n", x, df, prob);
    }

 END:
  return exit_status;
}