public class BallTossExercise4 {

    public static void main (String[] argv)
    {
        // Make an instance of modified simulator.
        BallTossSimulator3 sim = new BallTossSimulator3 ();

        sim.run (1000, 50, 100, true);
        double beforeV = sim.getV ();
        sim.run (1000, 50, 100, false);
        double afterV = sim.getV ();
        
        System.out.println ("before: " + beforeV + "  after: " + afterV);
    }

}