Create an inheritance hierarchy containing base class Account and derived classes SavingsAccount and CheckingAccount that inherit from class Account?

Answer 1

// ASSIGNMENT 3.cpp : Defines the entry point for the console application.

//

#include

"stdafx.h"

#include

"conio.h"

#include

<iostream>

using

std::fixed;

using

namespace std;

class

Account

{

public: Account( double ); // constructor initializes balance

void

credit( double ); // add an amount to the account balance bool debit( double ); // subtract an amount from the account balance

void setBalance( double ); // sets the account balance

double getBalance(); // return the account balance

private: double balance;

// data member that stores the balance

// 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

};

// end class Account

class

SavingsAccount : public Account

{

public:

// constructor initializes balance and interest rate

SavingsAccount(

double, double );

double calculateInterest(); // determine interest owed

private:

double interestRate;

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 // interest rate (percentage) earned by account

};

// end class SavingsAccount

class

CheckingAccount : public Account

{

public:

// constructor initializes balance and transaction fee

CheckingAccount(

double, double );

void

credit( double ); // redefined credit function

bool debit( double ); // redefined debit function

private:

double transactionFee; // fee charged per transaction

// utility function to charge fee

void

chargeFee();

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

};

// end class CheckingAccount

int

_tmain(int argc, _TCHAR* argv[])

{

Account account1( 50.0 );

// create Account object

SavingsAccount account2( 25.0, .03 );

// create SavingsAccount object

CheckingAccount account3( 80.0, 1.0 );

// create CheckingAccount object

cout << fixed << setprecision ( 2 );

// display initial balance of each object

cout <<

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

cout <<

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

cout <<

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

cout <<

"\nAttempting to debit $25.00 from account1." << endl;

account1.debit( 25.0 );

// try to debit $25.00 from account1

cout <<

"\nAttempting to debit $30.00 from account2." << endl;

account2.debit( 30.0 );

// try to debit $30.00 from account2

cout <<

"\nAttempting to debit $40.00 from account3." << endl;

account3.debit( 40.0 );

// try to debit $40.00 from account3

// display balances

cout <<

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

cout <<

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

cout <<

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

cout <<

"\nCrediting $40.00 to account1." << endl;

account1.credit( 40.0 );

// credit $40.00 to account1

cout <<

"\nCrediting $65.00 to account2." << endl;

account2.credit( 65.0 );

// credit $65.00 to account2

cout <<

"\nCrediting $20.00 to account3." << endl;

account3.credit( 20.0 );

// credit $20.00 to account3

// display balances

cout <<

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

cout <<

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

cout <<

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

// add interest to SavingsAccount object account2

double interestEarned = account2.calculateInterest();

cout <<

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

account2.credit( interestEarned );

cout <<

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

return 0;

}

// end main