/* nag_1d_quad_vals(d01gac) Example Program
 *
 * Copyright 1991 Numerical Algorithms Group.
 *
 * Mark 2, 1991.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagd01.h>

#define NMAX 21
int main(void)
{

  Integer i, n;
  static NagError fail;
  double x[NMAX], y[NMAX], error, ans;

  Vprintf("d01gac Example Program Results\n");
  Vscanf("%*[^\n]");    /* Skip heading in data file */
  Vscanf("%ld",&n);
  if (n <= NMAX)
    {
      for (i=0; i < n; ++i)
        Vscanf("%lf%lf", &x[i], &y[i]);
      d01gac(n, x, y, &ans, &error, &fail);
      if (fail.code == NE_NOERROR)
        {
          Vprintf("Integral = %7.4f\n", ans);
          Vprintf("Estimated error = %7.4f\n", error);
          return EXIT_SUCCESS;
        }
      else
        {
          Vprintf("%s\n", fail.message);
          return EXIT_FAILURE;
        }
    }
  else
    {
      Vprintf("More than NMAX data points\n");
      return EXIT_FAILURE;
    }
}