/* nag_log_beta (s14cbc) Example Program.
 *
 * Copyright 2017 Numerical Algorithms Group.
 *
 * Mark 26.2, 2017.
 */

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

int main(void)
{
  Integer exit_status = 0;
  double a, b, lb;
  NagError fail;

  INIT_FAIL(fail);

  /* Skip heading in data file */
  scanf("%*[^\n]");
  printf("nag_log_beta (s14cbc) Example Program Results\n");
  printf("  a     b     ln(beta(a,b))\n");
  while (scanf("%lf %lf", &a, &b) != EOF)
  {
    /* nag_log_beta (s14cbc).
     * Log Beta function ln(beta(a,b))
     */
    lb = nag_log_beta(a, b, &fail);
    if (fail.code != NE_NOERROR) {
      printf("Error from nag_log_beta (s14cbc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }
    printf("%5.2f %5.2f  %12.4e\n", a, b, lb);
  }

END:
  return exit_status;
}