/*
 * This code is from "Algorithms in C, Third Edition,"
 * by Robert Sedgewick, Addison Wesley Longman, 1998.
 */
#include <math.h>
#include "Point.h"
float distance(point a, point b)
  { float dx = a.x - b.x, dy = a.y - b.y;
    return sqrt(dx*dx + dy*dy);
  }