Adding a scoll list

I am adding to the program a scoll list (12 lines at a time).   I can not get the program to run.  Please help.  Thank you
#include <iomanip>
  #include <math.h>
  #include <string>
  #include <iostream>
  #include <stdlib.h>

//Start of program
  using namespace std;
  int main(void)
  {
 
// Set up required variables  
    double  loanAmount; // loan amount                      
    int Years;          // Years of loan                      
    int term;           // Loan term
    int month = 12;     // 1 year = 12 months
    double  IntRate;    // Interest rate                    
    double MonthRate;   // Months of loans
    double MonthTerm;   // Term of loan
     char choice;

     while (true)
     {
//Infomation need for Monthly Mortgage Payment

           cout << "Enter the loan amount in dollars: ";
           cin >> loanAmount;
   
           cout << "Enter the loan term in years: ";
           cin >> Years;
   
           cout << "Enter the interest rate: ";
           cin >> IntRate;

// Calculate Monthly Mortgage Payment
   
          MonthTerm = Years * 12;          
          MonthRate = IntRate / (12 * 100);
 
          double PowCalc = pow(1+MonthRate,MonthTerm);
          double paymentAmount = ((MonthRate*PowCalc) / (PowCalc-1)) * loanAmount;

         cout << fixed << showpoint;            //Decimal Function
         cout << setprecision(2);              //Set Number of Decimals places

//Information give on  Monthly Mortgage Payment
      system("cls");
      cout << endl;   //space
      cout << "Loan amount of $" << loanAmount << endl;
      cout << endl;   //space
      cout << "For a term of " << Years << " years" << " (" << Years*12 << " months)" << endl;
      cout << endl;   //space
      cout << "With an interest rate of " << IntRate << "%" << endl;
      cout << endl;   //space
      cout << "Monthly mortgage payment of $" <<paymentAmount << " per month." << endl;
//Quit or Continues (Loop)  
       do
//Produce a listing for each month
      monthly_payment = amount;
      for (month=1; month<term_months + 1; month++)      
      {
//Information give on  Monthly Mortgage Payment
      system("cls");
      cout << endl;   //space
      cout << "Loan amount of $" << loanAmount << endl;
      cout << endl;   //space
      cout << "For a term of " << Years << " years" << " (" << Years*12 << " months)" << endl;
      cout << endl;   //space
      cout << "With an interest rate of " << IntRate << "%" << endl;
      cout << endl;   //space
      cout << "Monthly mortgage payment of $" <<paymentAmount << " per month." << endl;        
     
// pause output every twelve lines, except for the final output
         if (month % 21 == 0 && month % term_months != 0)
               {  
                    system("pause");
                    system("cls");
         }// end if
      }// end for

     cout << "Would you like to perform another calculation? ";
     cin >> choice;
    } while (choice == 'Y' || choice == 'y');
    return 0;
   
}