/*
 * This code is from "Algorithms in C, Third Edition,"
 * by Robert Sedgewick, Addison Wesley Longman, 1998.
 */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "Point.h"
float randFloat()
  { return 1.0*rand()/RAND_MAX; }
main(int argc, char *argv[])
 { float d = atof(argv[2]); 
   int i, j, cnt = 0, N = atoi(argv[1]);
   point *a = malloc(N*(sizeof(*a)));
   for (i = 0; i < N; i++)
     { a[i].x = randFloat(); a[i].y = randFloat(); }
   for (i = 0; i < N; i++)
     for (j = i+1; j < N; j++)
       if (distance(a[i], a[j]) < d) cnt++; 
   printf("%d edges shorter than %f\n", cnt, d);
 }