public ATM()
{
currentState = new NoCardState(1000, this);
}
// This constructor will create new state taking values from old state
public CashWithdrawnState(ATMState state)
: this(state.DummyCashPresent, state.Atm)
{
}
// This constructor will create new state taking values from old state
public NoCardState(ATMState state)
: this(state.DummyCashPresent, state.Atm)
{
}