Question

*********C++ Program************

Enhance the Account class to compute the interest on the current balance. An account has initial balance of $10,000.00, and 6% percent annual interest is compounded monthly until the investment is double.
Write a main function to determine the number of months to double the initial investment. Create function name "double investment" for this project. Create a menu to allow the user to enter the initial investment and the annual interest rate. Please create a header file(bank.h) and a cpp file (bank.cpp). Below is code provided that needs to be altered to add "double investment" function. Please include code and output screenshots to show validation of functionality. Thank you!

#include <iostream>

using namespace std;

//public class

class Account{

public:

//instance variables

double amount;

  

//creates account and sets amount with users account set-up value

Account(double a){

amount = a;

}

  

//adds to amount in account once deposited

void deposit(double a){

if(a < 0){

return;

}

amount += a;

}

  

//decreases amount in account once withdrawn

void withdraw(double a){

if(amount-a < 0){

return;

}

amount -= a;

}

  

//returns balance of account

double get_balance(){

return amount;

}

};

Answer 1

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

//bank.h

#ifndef BANK_H
#define BANK_H
class Account{

public:

//instance variables

double amount;
double rate;

//creates account and sets amount with users account set-up value

Account(double a,double r);

//adds to amount in account once deposited

void deposit(double a);

//decreases amount in account once withdrawn

void withdraw(double a);

//returns balance of account

double get_balance();
double investment();

};

#endif

//bank.cpp

#include "bank.h"
Account::Account(double a,double r){

amount = a;
rate=r;
}
void Account::deposit(double a){

if(a < 0){

return;

}

amount += a;

}

//decreases amount in account once withdrawn

void Account::withdraw(double a){

if(amount-a < 0){

return;

}

amount -= a;

}

//returns balance of account

double Account::get_balance(){

return amount;

}
double Account::investment()
{
int n=0;
double num=amount;
while(num<2.0*amount)
{
num=(1.0+rate/12.0)*num;
n=n+1;
}
return n;
}

//main.cpp

#include <iostream>
#include "bank.cpp"
using namespace std;

//public class

int main()
{

cout<<"Enter initial investment: ";
double amount;
cin>>amount;
cout<<"Enter percent rate: ";
double rate;
cin>>rate;
Account *p=new Account(amount,rate/100.0);
int n=p->investment();
cout<<"It takes "<<n<<" months to double the intial investment\n";

return 0;
}

Kindly revert for any queries

Thanks.