// CashDispenser.java

// Represents the cash dispenser of the ATM

public class CashDispenser {

// the default initial number of bills in the cash dispenser

private final static int INITIAL_COUNT = 500;

private int count; // number of $20 bills remaining

// no-argument CashDispenser constructor initializes count to default

public CashDispenser() {

count = INITIAL_COUNT; // set count attribute to default

}

// simulates dispensing of specified amount of cash

public void dispenseCash(int amount) {

int billsRequired = amount / 20; // number of $20 bills required

count -= billsRequired; // update the count of bills

}

// indicates whether cash dispenser can dispense desired amount

public boolean isSufficientCashAvailable(int amount) {

int billsRequired = amount / 20; // number of $20 bills required

if (count >= billsRequired) {

return true; // enough bills available

}

else {

return false; // not enough bills available

}

}

}

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