// CashDispenser.cs
// Represents the cash dispenser of the ATM
public class CashDispenser
{
   // the default initial number of bills in the cash dispenser
   private const int INITIAL_COUNT = 500;
   private int billCount; // number of $20 bills remaining

   // parameterless constructor initializes billCount to INITIAL_COUNT
   public CashDispenser()
   {
      billCount = INITIAL_COUNT; // set billCount to INITIAL_COUNT
   } // end constructor

   // simulates dispensing the specified amount of cash
   public void DispenseCash( decimal amount )
   {
      // number of $20 bills required
      int billsRequired = ( ( int ) amount ) / 20;
      billCount -= billsRequired;
   } // end method DispenseCash

   // indicates whether cash dispenser can dispense desired amount
   public bool IsSufficientCashAvailable( decimal amount ) 
   {
      // number of $20 bills required
      int billsRequired = ( ( int ) amount ) / 20;

      // return whether there are enough bills available
      return ( billCount >= billsRequired );
   } // end method IsSufficientCashAvailable
} // end class CashDispenser

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