Please use C++ to write this program. Develop a polymorphic banking program usin
ID: 3878893 • Letter: P
Question
Please use C++ to write this program.
Develop a polymorphic banking program using the Account hierarchy created in Exercise 11.10. Create a vector of Account pointers to SavingsAccount and CheckingAccount objects. For each Account in the vector, allow the user to specify an amount of money to withdraw from the Account using member function debit and an amount of money to deposit into the Account using member function credit. As you process each Account, determine its type. If an Account is a SavingsAccount, calculate the amount of interest owed to the Account using member function calculateInterest, then add the interest to the account balance using member function credit. After processing an Account, print the updated account balance obtained by invoking base-class member function getBalance.Explanation / Answer
//Please see the source code below:
// File Account.h Account class.
#ifndef ACCOUNT_H
#define ACCOUNT_H
class Account
{
public:
Account( double ); // constructor initializes balance
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
// File 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
// Header file 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
// source file 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
// Header file 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 );
/* Write a function prototype for virtual function credit, which will redefine the inherited credit function */
/* Write a function prototype for virtual function debit, which will redefine the inherited debit function */
private:
double transactionFee; // fee charged per transaction
// utility function to charge fee
void chargeFee();
}; // end class CheckingAccount
#endif
// source file 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
// 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
/* Write declarations for a vector of four pointers to Account objects, called accounts */
// 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: $" << /* Call the getBalance function through Account pointer i */;
double withdrawalAmount = 0.0;
cout << " Enter an amount to withdraw from Account " << i + 1 << ": ";
cin >> withdrawalAmount;
/* Call the debit function through Account pointer i */
double depositAmount = 0.0;
cout << "Enter an amount to deposit into Account " << i + 1 << ": ";
cin >> depositAmount;
/* Call the credit function through Account pointer i */
// downcast pointer
SavingsAccount *savingsAccountPtr =
/* Write a dynamic_cast operation to to attempt to downcast Account pointer i to a SavingsAccount pointer */
// if Account is a SavingsAccount, calculate and add interest
if ( /* Write a test to determine if savingsAccountPtr isn't 0 */ )
{
double interestEarned = /* Call member function calculateInterest through savingsAccountPtr */;
cout << "Adding $" << interestEarned << " interest to Account " << i + 1 << " (a SavingsAccount)" << endl;
/* Use the credit function to credit interestEarned to the SavingsAccount pointed to by savingsAccountPtr*/
} // end if
cout << "Updated Account " << i + 1 << " balance: $" << /* Call the getBalance function through Account pointer i */ << " ";
} // end for
} // end main