SingleSource/Benchmarks/Shootout/ary3.c

/* -*- mode: c -*-
 * $Id$
 * http://www.bagley.org/~doug/shootout/
 *
 * this program is modified from:
 *   http://cm.bell-labs.com/cm/cs/who/bwk/interps/pap.html
 * Timing Trials, or, the Trials of Timing: Experiments with Scripting
 * and User-Interface Languages by Brian W. Kernighan and
 * Christopher J. Van Wyk.
 *
 * I added free() to deallocate memory.
 */

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
#ifdef SMALL_PROBLEM_SIZE
#define LENGTH 150000
#else
#define LENGTH 1500000
#endif
  int n = ((argc == 2) ? atoi(argv[1]) : LENGTH);
  int i, k, *x, *y;

  x = (int *) calloc(n, sizeof(int));
  y = (int *) calloc(n, sizeof(int));

  for (i = 0; i < n; i++) {
    x[i] = i + 1;
  }

  for (k=0; k<1000; k++) {
    for (i = n-1; i >= 0; i--) {
      y[i] += x[i];
    }
  }

  printf("%d %d\n", y[0], y[n-1]);

  free(x);
  free(y);
  
  return(0);
}