Question

MAIN OBJECTIVE

      Develop a polymorphic banking program using the Account hierarchy created (below).

C++ Capture an output.

polymorphism.

Write an application that creates a vector of Account pointers to two SavingsAccount and two CheckingAccountobjects. 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, and 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.

Account.h

#ifndef ACCOUNT_H

#define ACCOUNT_H

class Account

{

public:

Account( double );

void credit( double );

bool debit( double );

void setBalance( double );

double getBalance();

private:

double balance;

};

#endif

Account.cpp

#include <iostream>

using std::cout;

using std::endl;

#include "Account.h"

Account::Account( double initialBalance )

{

if ( initialBalance >= 0.0 )

balance = initialBalance;

else

{

cout << "Error: Initial balance cannot be negative." << endl;

balance = 0.0;

}

}

void Account::credit( double amount )

{

balance = balance + amount;

}

bool Account::debit( double amount )

{

if ( amount > balance )

{

cout << "Debit amount exceeded account balance." << endl;

return false;

}

else

{

balance = balance - amount;

return true;

}

}

void Account::setBalance( double newBalance )

{

balance = newBalance;

}

double Account::getBalance()

{

return balance;

}

SavingsAccount.h

#ifndef SAVINGS_H

#define SAVINGS_H

#include "Account.h"

class SavingsAccount : public Account

{

public:

SavingsAccount( double, double );

double calculateInterest();

private:

double interestRate;

};

#endif

SavingsAccount.cpp

#include "SavingsAccount.h"

SavingsAccount::SavingsAccount( double initialBalance, double rate )

: Account( initialBalance )

{

interestRate = ( rate < 0.0 ) ? 0.0 : rate;

}

double SavingsAccount::calculateInterest()

{

return getBalance() * interestRate;

}

CheckingAccount.h

#ifndef CHECKING_H

#define CHECKING_H

#include "Account.h"

class CheckingAccount : public Account

{

public:

CheckingAccount( double, double );

void credit( double );

bool debit( double );

private:

double transactionFee;

void chargeFee();

};

#endif

CheckingAccount.cpp

#include <iostream>

using std::cout;

using std::endl;

#include "CheckingAccount.h"

CheckingAccount::CheckingAccount( double initialBalance, double fee )

: Account( initialBalance )

{

transactionFee = ( fee < 0.0 ) ? 0.0 : fee;

}

void CheckingAccount::credit( double amount )

{

Account::credit( amount );

chargeFee();

}

bool CheckingAccount::debit( double amount )

{

bool success = Account::debit( amount );

if ( success )

{

chargeFee();

return true;

}

else

return false;

}

void CheckingAccount::chargeFee()

{

Account::setBalance( getBalance() - transactionFee );

cout << "$" << transactionFee << " charging the transaction fee." << endl;

}

Inheritance.cpp

#include <iostream>

using std::cout;

using std::endl;

#include <iomanip>

using std::setprecision;

using std::fixed;

#include "Account.h"

#include "SavingsAccount.h"

#include "CheckingAccount.h"

int main()

{

Account account1( 80.0 );

SavingsAccount account2( 45.0, .04 );

CheckingAccount account3( 100.0, 2.0 );

cout << fixed << setprecision( 2 );

cout << "balance of account1: $" << account1.getBalance() << endl;

cout << "balance of account 2: $" << account2.getBalance() << endl;

cout << "balance of account 3: $" << account3.getBalance() << endl;

cout << "\n debit $35.00 from account1." << endl;

account1.debit( 35.0 );

cout << "\n debit $50.00 from account2." << endl;

account2.debit( 50.0 );

cout << "\ndebit $45.00 from account3." << endl;

account3.debit( 45.0 );

cout << "\naccount1 balance: $" << account1.getBalance() << endl;

cout << "account2 balance: $" << account2.getBalance() << endl;

cout << "account3 balance: $" << account3.getBalance() << endl;

cout << "\nCredit $60.00 to account1." << endl;

account1.credit( 60.0 );

cout << "\nCredit $45.00 to account2." << endl;

account2.credit( 45.0 );

cout << "\nCredit $30.00 to account3." << endl;

account3.credit( 30.0 );

cout << "\naccount1 balance: $" << account1.getBalance() << endl;

cout << "account2 balance: $" << account2.getBalance() << endl;

cout << "account3 balance: $" << account3.getBalance() << endl;

double interestEarned = account2.calculateInterest();

cout << "\nAdding $" << interestEarned << " interest to account2." << endl;

account2.credit( interestEarned );

cout << "\n updated account2 balance: $" << account2.getBalance() << endl;

return 0;

}

Answer 1

Code:

Inheritance.cpp

#include <iostream>

using std::cout;

using std::endl;

#include <iomanip>

#include <vector>

using std::setprecision;

using std::fixed;

#include "Account.h"

#include "SavingsAccount.h"

#include "CheckingAccount.h"

using namespace std;

int main()

{

vector <Account*> accounts(5);

    accounts[ 0 ] = new Account( 80 );

    accounts[ 1 ] = new SavingsAccount( 45.0, .04 );

    accounts[ 2 ] = new CheckingAccount( 100.0, 2.0);

     SavingsAccount account2( 45.0, .04 );

cout << "balance of account1: $" << accounts[0]->getBalance() << endl;

cout << "balance of account 2: $" << accounts[1]->getBalance() << endl;

cout << "balance of account 3: $" << accounts[2]->getBalance() << endl;

cout << "\n debit $35.00 from account1." << endl;

accounts[0]->debit( 35.0 );

cout << "\n debit $50.00 from account2." << endl;

accounts[1]->debit( 50.0 );

cout << "\ndebit $45.00 from account3." << endl;

accounts[2]->debit( 45.0 );

cout << "\naccount1 balance: $" << accounts[0]->getBalance() << endl;

cout << "account2 balance: $" << accounts[1]->getBalance() << endl;

cout << "account3 balance: $" << accounts[2]->getBalance() << endl;

cout << "\nCredit $60.00 to account1." << endl;

accounts[0]->credit( 60.0 );

cout << "\nCredit $45.00 to account2." << endl;

accounts[1]->credit( 45.0 );

cout << "\nCredit $30.00 to account3." << endl;

accounts[2]->credit( 30.0 );

cout << "\naccount1 balance: $" << accounts[0]->getBalance() << endl;

cout << "account2 balance: $" << accounts[1]->getBalance() << endl;

cout << "account3 balance: $" << accounts[2]->getBalance() << endl;

double interestEarned = dynamic_cast<SavingsAccount*>(accounts[1])->calculateInterest();

cout << "\nAdding $" << interestEarned << " interest to account2." << endl;

accounts[1]->credit( interestEarned );

cout << "\n updated account2 balance: $" << accounts[1]->getBalance() << endl;

system("pause");

return 0;

}

SavingsAccount.h

#ifndef SAVINGS_H

#define SAVINGS_H

#include "Account.h"

class SavingsAccount : public Account

{

public:

SavingsAccount( double, double );

~SavingsAccount();

double calculateInterest();

private:

double interestRate;

};

#endif

SavingsAccount.cpp

#include "SavingsAccount.h"

SavingsAccount::SavingsAccount( double initialBalance, double rate )

: Account( initialBalance )

{

interestRate = ( rate < 0.0 ) ? 0.0 : rate;

}

SavingsAccount::~SavingsAccount() {}

double SavingsAccount::calculateInterest()

    

{

return getBalance() * interestRate;

}

Account.h

#ifndef ACCOUNT_H

#define ACCOUNT_H

class Account

{

public:

Account( double );

virtual ~Account();

virtual void credit( double );

virtual bool debit( double );

void setBalance( double );

double getBalance();

private:

double balance;

};

#endif

CheckingAccount.h

#ifndef CHECKING_H

#define CHECKING_H

#include "Account.h"

class CheckingAccount : public Account

{

public:

CheckingAccount( double, double );

~CheckingAccount();

void credit( double );

bool debit( double );

private:

double transactionFee;

void chargeFee();

};

#endif

Account.cpp

#include <iostream>

using std::cout;

using std::endl;

#include "Account.h"

Account::Account( double initialBalance )

{

if ( initialBalance >= 0.0 )

balance = initialBalance;

else

{

cout << "Error: Initial balance cannot be negative." << endl;

balance = 0.0;

}

}

Account:: ~Account() {}

void Account::credit( double amount )

{   

balance = balance + amount;

}

bool Account::debit( double amount )

{

if ( amount > balance )

{

cout << "Debit amount exceeded account balance." << endl;

return false;

}

else

{

balance = balance - amount;

return true;

}

}

void Account::setBalance( double newBalance )

{

balance = newBalance;

}

double Account::getBalance()

{

return balance;

}

CheckingAccount.cpp

#include <iostream>

using std::cout;

using std::endl;

#include "CheckingAccount.h"

CheckingAccount::CheckingAccount( double initialBalance, double fee )

: Account( initialBalance )

{

transactionFee = ( fee < 0.0 ) ? 0.0 : fee;

}

CheckingAccount::~CheckingAccount() {}

void CheckingAccount::credit( double amount )

{

Account::credit( amount );

chargeFee();

}

bool CheckingAccount::debit( double amount )

{

bool success = Account::debit( amount );

if ( success )

{

chargeFee();

return true;

}

else

return false;

}

void CheckingAccount::chargeFee()

{

Account::setBalance( getBalance() - transactionFee );

cout << "$" << transactionFee << " charging the transaction fee." << endl;

}

Output:

İT CAUser6302330\Documents\Visual Studio 2010\Projects\1008Debug\1008.exe balance of account1 80 balance of account 2: $45 balance of account 3: $100 debit $35.00 from accounti. debit $50.00 from accou Debit amount exceeded account balance. nt2. debit $45.00 from accou $2 charging the transaction fee nt3. accounti balance: $45 account2 balance: 45 account3 balance: $53 Credit $60.00 to account1. Credit $45.00 to account2 Credit $30.00 to account3 $2 charging the transaction fee count1 balance: $10!5 account2 balance: S90 account3 balance: $81 Adding $3.6 interest to account2. updated account2 balance: $93.6 Press any key to continue