static void Main(string[] args)
{
VolumeModel model = new VolumeModel();
VolumeView view = new VolumeView(new VolumeController(model), model);
view.OnVolumeUpButtonClick();
view.OnVolumeUpButtonClick();
view.OnVolumeDownButtonClick();
}
public VolumeController(VolumeModel model)
{
this.model = model;
}