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Can you explain how to add arrays, so I can understand better. #include "stdafx.h" #include <iostream> #include <cstdlib> using namespace std; int...

Can you explain how to add arrays, so I can understand better.


#include "stdafx.h"

#include <iostream>

#include <cstdlib>


using namespace std;

int nMonths = 0;

float loanAmount;

int totalPaid = 0.0f;


void process() {


      float interestRate;

      float monthlyPayment;

      cout << "What is the amount of the loan?:$";

      cin >> loanAmount; cin.ignore();

      cout << "What is the interest rate on the loan?:$";

      cin >> interestRate; interestRate /= 100; cin.ignore();

      cout << "What is the desired monthly payment?:$";1

      cin >> monthlyPayment; cin.ignore();

      while (monthlyPayment < loanAmount * interestRate / 12) {

             cout << "Not a valid amount, Amount must be greater than $";

             cout << (loanAmount * interestRate / 12) << endl;

             cout << "What is the desired monthly payment amount? $";

             cin >> monthlyPayment; cin.ignore();

      }

      float interestToAdd = 0.0f;

      float remaining = loanAmount;

      float toAdd = 0.0f;

      cout << endl;

      cout << "Month" << " (Interest Added)" << " (Amount Paid)" << " (Debt Remaining)" << endl;

      while (remaining > monthlyPayment) {

             interestToAdd = remaining * interestRate / 12;

             nMonths++;

             remaining += interestToAdd;

             if (remaining > monthlyPayment) {

                    toAdd = monthlyPayment;

             }

             else {

                    toAdd = remaining;

             }

             cout << nMonths << " $" << interestToAdd << " $" << toAdd

                    << " $" << remaining << endl;

             totalPaid += toAdd;

             remaining -= toAdd;

      }


}

void displayResult() {


      cout << endl << "Statistics about loan. " << endl;

      cout << "Initial loan amount: $" << loanAmount << endl;

      cout << "Total amount paid: $" << totalPaid << endl;

      cout << "Time to pay off loan: " << nMonths << endl;

      cout << "Overpay percentage: " << (totalPaid / loanAmount) << endl;

      cin.ignore();


}

void chooseletterA() {


      float Amount, rateOfIntrest, monthlyAmountToPay, totalAmount;


      int lengthOfLoan;


      cout << "What is the amount of the loan?:$";


      cin >> Amount;


      cin.ignore();


      cout << "What is the interest rate on the loan?";


      cin >> rateOfIntrest;


      rateOfIntrest /= 100;


      cin.ignore();


      cout << "What is the length of loan?:$";


      cin >> lengthOfLoan;


      monthlyAmountToPay = (Amount*rateOfIntrest*pow((1 + rateOfIntrest), lengthOfLoan)) / (pow((1 + rateOfIntrest), lengthOfLoan - 1));


      cout << "Your monthly loan payment amount = $" << monthlyAmountToPay << endl;


      system("pause");


}


void chooseletterB() {


      float Amount, rateOfIntrest, monthlyAmountToPay, totalAmount;


      int lengthOfLoan;


      cout << "What is the monthly amount of the loan?:$";


      cin >> monthlyAmountToPay;


      cin.ignore();


      cout << "What is the interest rate on the loan?";


      cin >> rateOfIntrest;


      rateOfIntrest /= 100;


      cin.ignore();


      cout << "What is the length of loan?:$";


      cin >> lengthOfLoan;


      cin.ignore();


      Amount = monthlyAmountToPay * pow((1 + rateOfIntrest), lengthOfLoan - 1) / (rateOfIntrest*pow((1 + rateOfIntrest), lengthOfLoan));


      cout << "Your total loan amount = $" << Amount << endl;


      system("pause");


}


void chooseletterC() {


      float Amount, rateOfIntrest, monthlyAmountToPay, totalAmount;


      int lengthOfLoan;


      cout << "What is the amount of the loan?:$";


      cin >> Amount;


      cin.ignore();


      cout << "What is the monthly amount of the loan?:$";


      cin >> monthlyAmountToPay;


      cin.ignore();


      cout << "What is the length of loan?:$";


      cin >> lengthOfLoan;


      cin.ignore();


      rateOfIntrest = ((monthlyAmountToPay *lengthOfLoan) - Amount) / lengthOfLoan;


      cout << "Your monthly monthly rate of intrest = $" << rateOfIntrest / 12 << endl;


      system("pause");


}


void chooseletterD() {


      float Amount, rateOfIntrest, monthlyAmountToPay, totalAmount;


      int lengthOfLoan;


      cout << "What is the amount of the loan?:$";


      cin >> Amount;


      cin.ignore();


      cout << "What is the monthly amount of the loan?:$";


      cin >> monthlyAmountToPay;


      cin.ignore();


      cout << "What is the interest rate on the loan?";


      cin >> rateOfIntrest;


      rateOfIntrest /= 100;


      cin.ignore();


      lengthOfLoan = (log(Amount) - log(monthlyAmountToPay)) / (log(1 + rateOfIntrest));


      cout << "Your length of loan amount = $" << lengthOfLoan << endl;


      system("pause");


}


void multipleChoice() {


      cout << "Welcome to the multiple choice part of the program, please choose a letter: " << endl;


      cout << "A: Monthly payment " << endl;


      cout << "B: Loan amount " << endl;


      cout << "C: Length of loan " << endl;


      cout << "D: Interest rate " << endl;


      char ch;


      cin >> ch;


      switch (ch)


      {


      case 'A':


             chooseletterA();


             cout << "First question: Please solve for monthly payment. " << endl;


             break;


      case 'B':


             chooseletterB();


             cout << "Second question: Please solve for loan amount. " << endl;


             break;


      case 'C':


             chooseletterC();


             cout << "Third question: Please solve for length of loan. " << endl;


             break;


      case 'D':


             chooseletterD();


             cout << "Forth question: Please solve for interest rate. " << endl;


             break;

      }


      }

int main()


{

      int ch;

      do {

             cout << endl << "************************MENU***************************" << endl;

             cout << "1. Process Loan" << endl;

             cout << "2. Display Result" << endl;

             cout << "3. MultipleChoice" << endl;

             cout << "Enter your choice: ";

             cin >> ch;

             switch (ch) {

             case 1:

                    process();

                    break;

             case 2:

                    displayResult();

                    break;

             case 3:

                    multipleChoice();

                    break;

             default:

                    cout << "nEntered Wrong Keyword....nRe-enter Again";

                    break;

             }

         } while (ch < 3 && ch > 0);

      return 0;




}

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