Hello, new here, I am having trouble with a part of my C++ assignment I am doing for university.

The assignment is about writing a structure for a bank account and then subsequently enter values for the account's number, balance, interest rate, term of holding and deposit/withdrawal amounts. The part I am having trouble with involves displaying the balance for each month, and involves a while or for loop (I have tried both, with no progress).

Here is my code, which works aside from the section I am having trouble with which is highlighted in red.:

```
//Allows a user to enter an account number and balance for a bank account.
#include <iostream>
using namespace std;
struct BankAccount
{
int accountNumber;
double accountBalance;
double interestRate;
};
int main ()
{
BankAccount banker1;
BankAccount banker2;
do
{
cout<<"Please enter the account number for the first account: "<<endl;
cin>>banker1.accountNumber;
if(banker1.accountNumber < 1000 || banker1.accountNumber > 9999)
{
cout<<"That is not a vaild account number, please enter a number between 1000 and 9999."<<endl;
}
}
while(banker1.accountNumber < 1000 || banker1.accountNumber > 9999);
do
{
cout<<"Please enter the account balance for the first account: "<<endl;
cin>>banker1.accountBalance;
if(banker1.accountBalance < 0 || banker1.accountBalance > 100000)
{
cout<<"That is not a vaild account balance, please run the program again and enter a number greater than 0."<<endl;
}
}
while(banker1.accountBalance < 0 || banker1.accountBalance > 100000);
do
{
cout<<"Please enter the interest rate for the first account: "<<endl;
cin>>banker1.interestRate;
if(banker1.interestRate < 0 || banker1.interestRate > 0.15)
{
cout<<"That is not a vaild interest rate, please enter a number between 0 and 0.15."<<endl;
}
}
while(banker1.interestRate < 0 || banker1.interestRate > 0.15);
do
{
cout<<"Please enter the account number for the second account: "<<endl;
cin>>banker2.accountNumber;
if(banker2.accountNumber < 1000 || banker2.accountNumber > 9999)
{
cout<<"That is not a vaild account number, please run the program again and enter a number between 1000 and 9999."<<endl;
}
do
{
if(banker1.accountNumber == banker2.accountNumber)
{
cout<<"That is not a vaild account number, please run the program again and enter a different account number between 1000 and 9999."<<endl;
cin>>banker2.accountNumber;
}
}
while(banker1.accountNumber == banker2.accountNumber);
}
while(banker2.accountNumber < 1000 || banker2.accountNumber > 9999);
do
{
cout<<"Please enter the account balance for the second account: "<<endl;
cin>>banker2.accountBalance;
if(banker2.accountBalance < 0 || banker2.accountBalance > 100000)
{
cout<<"That is not a vaild account balance, please run the program again and enter a number greater than 0."<<endl;
}
}
while(banker2.accountBalance < 0 || banker2.accountBalance > 100000);
do
{
cout<<"Please enter the interest rate for the second account: "<<endl;
cin>>banker2.interestRate;
if(banker2.interestRate < 0 || banker2.interestRate > 0.15)
{
cout<<"That is not a vaild interest rate, please enter a number between 0 and 0.15."<<endl;
}
}
while(banker2.interestRate < 0 || banker2.interestRate > 0.15);
int checkDigit1 = banker1.accountNumber % 5;
int checkDigit2 = banker2.accountNumber % 5;
int numberOfYears;
do
{
cout<<"Please enter the number of years for the term the accounts will be held: "<<endl;
cin>>numberOfYears;
if(numberOfYears < 1 || numberOfYears > 10)
{
cout<<"That is not a vaild term duration, please enter a number between 1 and 10."<<endl;
}
}
while(numberOfYears < 1 || numberOfYears > 10);
double monthlyDepositAmount;
do
{
cout<<"Enter an amount to be deposited into both accounts each month: "<<endl;
cin>>monthlyDepositAmount;
if(monthlyDepositAmount < 0)
{
cout<<"That is not a valid deposit amount, please enter a number greater than 0."<<endl;
}
}
while(monthlyDepositAmount < 0);
double monthlyWithdrawalAmount;
do
{
cout<<"Enter an amount to be withdrawn from both accounts each month: "<<endl;
cin>>monthlyWithdrawalAmount;
if(monthlyWithdrawalAmount < 0)
{
cout<<"That is not a valid withdrawal amount, please enter a number greater than 0."<<endl;
}
}
while(monthlyWithdrawalAmount < 0);
int year;
int month;
double monthlyInterestRate1 = banker1.interestRate / 12;
double monthlyInterestRate2 = banker2.interestRate / 12;
double increment1;
double increment2 = monthlyInterestRate2;
cout<<"Starting balance for Account 1: "<<banker1.accountBalance<<endl;
cout<<"Starting balance for Account 2: "<<banker2.accountBalance<<endl;
for (year = 1; year <= numberOfYears; year ++)
{
cout<<"Year "<<year<<" "<<endl;
for(month = 1; month <= 12; month ++)
{
cout<<"Month "<<month<<" "<<endl;
for(increment1 = monthlyInterestRate1; increment1 <= banker1.interestRate; increment1 ++)
{
double newMonthlyBalance1 = banker1.accountBalance;
newMonthlyBalance1 = (newMonthlyBalance1 * (1 * monthlyInterestRate1)) + monthlyDepositAmount - monthlyWithdrawalAmount;
cout<<"Balance for first account: "<<newMonthlyBalance1<<endl;
}
for(increment2 = monthlyInterestRate2; increment2 <= banker2.interestRate; increment2 ++)
{
double newMonthlyBalance2 = (banker2.accountBalance * (1 + monthlyInterestRate2)) + monthlyDepositAmount - monthlyWithdrawalAmount;
cout<<"Balance for second account: "<<newMonthlyBalance2<<endl;
}
}
cout<<endl;
}
};
```

Any help is welcome, and thank you for reading.