public GumMachine(int balls, IOutputWritter writter)
{
_balls = balls;
_writter = writter;
SoldOut = new SoldOutState(this,_writter);
NoPenny = new NoPennyState(this, _writter);
Sold = new SoldState(this, _writter);
HasPenny = new HasPennyState(_writter, this);
CurrentState = _balls<=0 ? SoldOut : NoPenny;
}
