Question

c++

Design a class named Account that contains (keep the data fields private):
a) An int data field named id for the account.
b) A double data field named balance for the account.
c) A double data field named annualInterestRate that stores the current interest rate.
d) A no-arg constructor that creates a default account with id 0, balance 0, and
annualInterestRate 0.
e) The accessor and mutator functions for id, balance, and annualInterestRate.
f) A function named getMonthlyInterestRate() that returns the monthly interest rate.
g) A function named withdraw(amount) that withdraws a specified amount from the account.
h) A function named deposit(amount) that deposits a specified amount to the account.
Implement the class. Write a test program that creates an Account object with an account ID of 1122, a balance of 20000, and an annual interest rate of 4.5%. Use the withdraw function to withdraw $2500, use the deposit function to deposit $3000, and print the balance, the monthly interest.

Answer 1

#include <iostream>

using namespace std;

class Account

{

private:

    // a) An int data field named id for the account.

    int id;

    // b) A double data field named balance for the account.

    double balance;

    // c) A double data field named annualInterestRate that stores the current interest rate.

    double annualInterestRate;

public:

    // d) A no-arg constructor that creates a default account with id 0, balance 0, and annualInterestRate 0.

    Account()

    {

        this->id = 0;

        this->balance = 0;

        this->annualInterestRate = 0;

    }

    // e) The accessor and mutator functions for id, balance, and annualInterestRate.

    int getId()

    {

        return id;

    }

    double getBalance()

    {

        return balance;

    }

    double getAnnualInterestRate()

    {

        return annualInterestRate;

    }

    void setId(int id)

    {

        this->id = id;

    }

    void setBalance(double balance)

    {

        this->balance = balance;

    }

    void setAnnualInterestRate(double annualInterestRate)

    {

        this->annualInterestRate = annualInterestRate;

    }

    // f) A function named getMonthlyInterestRate() that returns the monthly interest rate.

    double getMonthlyInterestRate()

    {

        return annualInterestRate / 12;

    }

    // g) A function named withdraw(amount) that withdraws a specified amount from the account.

    void withdraw(double amount)

    {

        if (balance >= amount)

            balance -= amount;

    }

    // h) A function named deposit(amount) that deposits a specified amount to the account.

    void deposit(double amount)

    {

        if (amount > 0)

            balance += amount;

    }

};

int main()

{

    // create an Account object with an

    Account testing;

    // account ID of 1122

    testing.setId(1122);

    // a balance of 20000

    testing.setBalance(20000);

    // an annual interest rate of 4.5%.

    testing.setAnnualInterestRate(4.5);

    // Use the withdraw function to withdraw $2500,

    testing.withdraw(2500);

    // use the deposit function to deposit $3000,

    testing.deposit(3000);

    // and print the balance, the monthly interest.

    cout << "Balance: $" << testing.getBalance() << endl;

    cout << "Monthly interest: $" << testing.getMonthlyInterestRate() * testing.getBalance() / 100 << endl;

}

.

Output:

.