/* nag_convolution_real(c06ekc) Example Program
 *
 * Copyright 1990 Numerical Algorithms Group.
 *
 * Mark 1, 1990.
 */

#include <nag.h>
#include <stdio.h>
#include <nag_stdlib.h>
#include <nagc06.h>

#define NMAX 64

int main(void)
{
  Integer j, n;
  double xa[NMAX], xb[NMAX], ya[NMAX], yb[NMAX];

  Vprintf("c06ekc Example Program Results\n");
  /* Skip heading in data file */
  Vscanf("%*[^\n]");
  while (scanf("%ld", &n)!=EOF)
    if (n>1 && n<=NMAX)
      {
        for (j = 0; j<n; ++j)
          {
            Vscanf("%lf%lf", &xa[j], &ya[j]);
            xb[j] = xa[j];
            yb[j] = ya[j];
          }
        c06ekc(Nag_Convolution, n, xa, ya, NAGERR_DEFAULT);
        c06ekc(Nag_Correlation, n, xb, yb, NAGERR_DEFAULT);
        Vprintf("\n          Convolution   Correlation\n\n");
        for (j = 0; j<n; ++j)
          Vprintf("%5ld %13.5f %13.5f\n", j, xa[j], xb[j]);
      }
    else
      {
        Vfprintf(stderr,"\n n = %ld which is an invalid value of n.\n", n);
        return EXIT_FAILURE;
      }
  return EXIT_SUCCESS;
}