1   // Fig. 23.37: Account.h
 2   // Account class definition. Represents a bank account.
 3   #ifndef ACCOUNT_H
 4   #define ACCOUNT_H
 5
 6   class Account
 7   {
 8   public:
 9      bool validatePIN( int ); // is user-specified PIN correct?
10      double getAvailableBalance(); // returns available balance
11      double getTotalBalance(); // returns total balance
12      void credit( double ); // adds an amount to the Account
13      void debit( double ); // subtracts an amount from the Account
14   private:
15      int accountNumber; // account number
16      int pin; // PIN for authentication
17      double availableBalance; // funds available for withdrawal
18      double totalBalance; // funds available + funds waiting to clear
19   }; // end class Account
20
21   #endif // ACCOUNT_H

 1   // Fig. 36.38: Transaction.h
 2   // Transaction abstract base class definition.
 3   #ifndef TRANSACTION_H
 4   #define TRANSACTION_H
 5
 6   class Screen; // forward declaration of class Screen
 7   class BankDatabase; // forward declaration of class BankDatabase
 8
 9   class Transaction
10   {
11   public:
12      int getAccountNumber(); // return account number
13      Screen &getScreen(); // return reference to screen
14      BankDatabase &getBankDatabase(); // return reference to bank database
15
16      // pure virtual function to perform the transaction
17      virtual void execute() = 0; // overridden in derived classes
18   private:
19      int accountNumber; // indicates account involved
20      Screen &screen; // reference to the screen of the ATM
21      BankDatabase &bankDatabase; // reference to the account info database
22   }; // end class Transaction
23
24   #endif // TRANSACTION_H