/* nag_monotonic_intg(e01bhc) Example Program
 *
 * Copyright 1991 Numerical Algorithms Group.
 *
 * Mark 2, 1991.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nage01.h>

#define NMAX 50

int main(void)
{
  double a, b, integral, d[NMAX], f[NMAX], x[NMAX];
  Integer n, r;

  Vprintf("e01bhc Example Program Results\n");
  Vscanf("%*[^\n]");  /* Skip heading in data file */
  Vscanf("%ld",&n);
  if (n>0 && n<=NMAX)
    {
      for (r=0; r<n; r++)
        Vscanf("%lf%lf%lf",&x[r], &f[r], &d[r]);
      Vprintf("                                          Integral\n");
      Vprintf("          a                  b            over (a,b)\n");
      /* Read a, b pairs until end of file and compute
       * definite integrals.
       */
      while(scanf("%lf%lf",&a,&b) !=EOF)
        {
          e01bhc(n, x, f, d, a, b, &integral, NAGERR_DEFAULT);
          Vprintf("%13.4f      %13.4f      %13.4f\n",a,b,integral);
        }
      return EXIT_SUCCESS;
    }
  else
    {
      Vfprintf(stderr,"n is out of range : n = %ld\n",n);
      return EXIT_FAILURE;
    }
}