Lab Exercises 4th

201816040130/Account.cpp

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+// Lab 1: Account.cpp
+// Member-function definitions for class Account.
+#include <iostream>
+using namespace std;
+
+#include "Account.h" // include definition of class Account
+
+// Account constructor initializes data member balance
+Account::Account( double initialBalance )
+{
+   // if initialBalance is greater than or equal to 0.0, set this value 
+   // as the balance of the Account
+   if ( initialBalance >= 0.0 )
+      balance = initialBalance;
+   else // otherwise, output message and set balance to 0.0
+   {
+      cout << "Error: Initial balance cannot be negative." << endl;
+      balance = 0.0;
+   } // end if...else
+} // end Account constructor
+
+// credit (add) an amount to the account balance
+void Account::credit( double amount )
+{
+   balance = balance + amount; // add amount to balance
+} // end function credit
+
+// debit (subtract) an amount from the account balance
+// return bool indicating whether money was debited
+bool Account::debit( double amount )
+{
+   if ( amount > balance ) // debit amount exceeds balance
+   {
+      cout << "Debit amount exceeded account balance." << endl;
+      return false;
+   } // end if
+   else // debit amount does not exceed balance
+   {
+      balance = balance - amount;
+      return true;
+   } // end else
+} // end function debit
+
+// set the account balance
+void Account::setBalance( double newBalance )
+{
+   balance = newBalance;
+} // end function setBalance
+
+// return the account balance
+double Account::getBalance()
+{
+   return balance;
+} // end function getBalance
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/Account.h

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+// Lab 1: Account.h
+// Definition of Account class.
+#ifndef ACCOUNT_H
+#define ACCOUNT_H
+
+class Account
+{
+public:
+   Account( double ); // constructor initializes balance
+  virtual void credit(double);
+  virtual bool debit(double);
+   void setBalance( double ); // sets the account balance
+   double getBalance(); // return the account balance
+private:
+   double balance; // data member that stores the balance
+}; // end class Account
+
+#endif
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/CheckingAccount.cpp

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+// Lab 1: CheckingAccount.cpp
+// Member-function definitions for class CheckingAccount.
+#include <iostream>
+using namespace std;
+
+#include "CheckingAccount.h" // CheckingAccount class definition
+
+// constructor initializes balance and transaction fee
+CheckingAccount::CheckingAccount( double initialBalance, double fee )
+   : Account( initialBalance ) // initialize base class
+{
+   transactionFee = ( fee < 0.0 ) ? 0.0 : fee; // set transaction fee
+} // end CheckingAccount constructor
+
+// credit (add) an amount to the account balance and charge fee
+void CheckingAccount::credit( double amount )
+{
+   Account::credit( amount ); // always succeeds
+   chargeFee();
+} // end function credit
+
+// debit (subtract) an amount from the account balance and charge fee
+bool CheckingAccount::debit( double amount )
+{
+   bool success = Account::debit( amount ); // attempt to debit
+
+   if ( success ) // if money was debited, charge fee and return true
+   {
+      chargeFee();
+      return true;
+   } // end if
+   else // otherwise, do not charge fee and return false
+      return false;
+} // end function debit
+
+// subtract transaction fee
+void CheckingAccount::chargeFee()
+{
+   Account::setBalance( getBalance() - transactionFee );
+   cout << "$" << transactionFee << " transaction fee charged." << endl;
+} // end function chargeFee
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/CheckingAccount.h

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+// Lab 1: CheckingAccount.h
+// Definition of CheckingAccount class.
+#ifndef CHECKING_H
+#define CHECKING_H
+
+#include "Account.h" // Account class definition
+
+class CheckingAccount : public Account
+{
+public:
+   // constructor initializes balance and transaction fee
+   CheckingAccount( double, double );
+    virtual void credit(double) override;
+    virtual bool debit(double) override;
+private:
+   double transactionFee; // fee charged per transaction
+
+   // utility function to charge fee
+   void chargeFee();
+}; // end class CheckingAccount
+
+#endif
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/SavingsAccount.cpp

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+// Lab 1: SavingsAccount.cpp
+// Member-function definitions for class SavingsAccount.
+#include "SavingsAccount.h" // SavingsAccount class definition
+
+// constructor initializes balance and interest rate
+SavingsAccount::SavingsAccount( double initialBalance, double rate )
+   : Account( initialBalance ) // initialize base class
+{
+   interestRate = ( rate < 0.0 ) ? 0.0 : rate; // set interestRate
+} // end SavingsAccount constructor
+
+// return the amount of interest earned
+double SavingsAccount::calculateInterest()
+{
+   return getBalance() * interestRate;
+} // end function calculateInterest
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/SavingsAccount.h

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+// Lab 1: SavingsAccount.h
+// Definition of SavingsAccount class.
+#ifndef SAVINGS_H
+#define SAVINGS_H
+
+#include "Account.h" // Account class definition
+
+class SavingsAccount : public Account
+{
+public:
+   // constructor initializes balance and interest rate
+   SavingsAccount( double, double );
+
+   double calculateInterest(); // determine interest owed
+private:
+   double interestRate; // interest rate (percentage) earned by account
+}; // end class SavingsAccount
+
+#endif
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/

201816040130/polymorphicBanking.cpp

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+// Lab 1: polymorphicBanking.cpp
+// Processing Accounts polymorphically.
+#include <iostream>
+#include <iomanip>
+#include <vector>
+using namespace std;
+
+#include "Account.h" // Account class definition
+#include "SavingsAccount.h" // SavingsAccount class definition
+#include "CheckingAccount.h" // CheckingAccount class definition
+
+int main()
+{
+   // create vector accounts
+
+    vector<Account *>accounts(4);
+   // initialize vector with Accounts
+   accounts[ 0 ] = new SavingsAccount( 25.0, .03 );
+   accounts[ 1 ] = new CheckingAccount( 80.0, 1.0 );
+   accounts[ 2 ] = new SavingsAccount( 200.0, .015 );
+   accounts[ 3 ] = new CheckingAccount( 400.0, .5 );
+
+   cout << fixed << setprecision( 2 );
+
+   // loop through vector, prompting user for debit and credit amounts
+   for ( size_t i = 0; i < accounts.size(); i++ )
+   {
+      cout << "Account " << i + 1 << " balance: $"
+         << accounts[i] -> getBalance();
+      double withdrawalAmount = 0.0;
+      cout << "\nEnter an amount to withdraw from Account " << i + 1
+         << ": ";
+      cin >> withdrawalAmount;
+        accounts[i] -> debit(withdrawalAmount);
+
+      double depositAmount = 0.0;
+      cout << "Enter an amount to deposit into Account " << i + 1
+         << ": ";
+      cin >> depositAmount;
+        accounts[i] -> credit(withdrawalAmount);
+      // downcast pointer
+      SavingsAccount *savingsAccountPtr =
+      dynamic_cast <SavingsAccount *>(accounts[i]);
+
+      // if Account is a SavingsAccount, calculate and add interest
+      if ( savingsAccountPtr != nullptr)
+      {
+         double interestEarned = savingsAccountPtr -> calculateInterest();
+         cout << "Adding $" << interestEarned << " interest to Account "
+            << i + 1 << " (a SavingsAccount)" << endl;
+
+		    savingsAccountPtr -> credit(interestEarned);
+      } // end if
+
+      cout << "Updated Account " << i + 1 << " balance: $"
+         << accounts[i] -> getBalance()
+		 << "\n\n";
+   } // end for
+} // end main
+
+
+/**************************************************************************
+ * (C) Copyright 1992-2012 by Deitel & Associates, Inc. and               *
+ * Pearson Education, Inc. All Rights Reserved.                           *
+ *                                                                        *
+ * DISCLAIMER: The authors and publisher of this book have used their     *
+ * best efforts in preparing the book. These efforts include the          *
+ * development, research, and testing of the theories and programs        *
+ * to determine their effectiveness. The authors and publisher make       *
+ * no warranty of any kind, expressed or implied, with regard to these    *
+ * programs or to the documentation contained in these books. The authors *
+ * and publisher shall not be liable in any event for incidental or       *
+ * consequential damages in connection with, or arising out of, the       *
+ * furnishing, performance, or use of these programs.                     *
+ **************************************************************************/