int main ()
{

  double checking, savings;
  int choice;

  get_balances (checking, savings);

  bool done = true;

  while(done)  {
       display_menu ();
       cout << "Enter Choice: ";
       cin >> choice;
       
       switch (choice)
       {
            case TRANSFER:
            transfer (checking, savings);
            break;

            case WITHDRAW:
            withdraw (checking);
            break;

            case CHECK:
            withdraw (checking);
            break;

            case DEPOSIT:
            deposit (checking);
            break;

            case EXIT:
            done = false;
            break;
	     }

  display_balances (checking, savings);
  }
  
  return 0;

}

do  {
 
// statement
 
} while(done==false);