Question

c++ program. can you please do commenting.

Question 1 [25]. (The Account Class) 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

The below mentioned code works as per the requirement stated in the question.

The code is commented to understand the flow.

#include <iostream>
using namespace std;

// create a class Account
class Account {

   private:  // private members
    int id;
    double balance;
    double annualInterestRate;
   public:
        
    // constructor
    Account(int i, double bal, double interest) 
    {   id = id;
        balance = bal;
        annualInterestRate = interest;
    }  
    
    // accessors and mutators
    void setAccountId (int x)
    {   
        id = x;
    }

    int getAccountId()
    {   
        return id;
    }
    
    void setBalance(double x)
    {   
        balance = x;
    }
    
    double getBalance()
    {   
        return balance;
    }
    
    void setInterest(double x)
    {   
        annualInterestRate = x;
    }
    
    double getInterest()
    {   
        return annualInterestRate;
    }
    
    double getMonthlyInterestRate()
    {   
        double  mInterestRate;
    
        mInterestRate = annualInterestRate / 12;  // to calculate monthly interest rate
        return mInterestRate;
    }
    
    bool withdraw(double amount)   // to withdraw balance function to deduct balance from current balance
    {   if (balance >= amount)
        {   
            balance -= amount;
                return true;
        }
        else
        {   
            return false;
        }
    }
    
    void deposit(double amount)  // to add balance to current balance
    {  
        
        balance += amount;
    }
    
    


    
};

int main()
{
    int choice;
    double amt;
    string flag = "true";
    
    Account ac(1122, 20000, 4.5); // create object of Account
    
    while (!flag.compare("true")){
    cout<<"Welcome to banking system: ";
    cout << "Enter 1 to make a deposit" << endl;
        cout << "Enter 2 to make a withdraw" << endl;
        cout << "Enter 3 to check balance" << endl;
        cout << "Enter 4 to check monthly interest rate" << endl;
        cout << "Enter 5 to display account summary" << endl;
        cout << "Enter 0 to exit" << endl;
        cin >> choice;
        
        switch (choice)  // cases to every option mentioned above
    {
    case 1:
        cout<< "Enter the amount to deposite: ";
        cin >> amt;
            ac.deposit (amt);    
        break;
        case 2: 
            cout<< "Enter the amount to withdraw: ";
        cin >> amt;
            ac.withdraw (amt);  
        break;
    case 3: 
            cout<< "Your current balance is : " ;
            cout<< ac.getBalance() << endl; 
        break;
        case 4: 
            cout << "Monthly interest rate: " << ac.getMonthlyInterestRate() << endl;
                break;
        case 5:
            cout << "Account ID: " << ac.getAccountId() << endl;
                cout << "Current Balance: " << ac.getBalance() << endl;
                cout << "Monthly interest rate: " << ac.getMonthlyInterestRate() << endl;     
                break;
        case 0:
                exit;
        default:    
            cout << "Invalid option" << endl;               
        }
        
        cout<< "continue? true/false" <<endl;
        
        cin >> flag;  // flag to continue the while loop 
}
    return 0;
}

Output screenshot: