// This program is not complete and will not compile

int main()
{
  
  cout << "Enter numbers to format, finish with Ctrl-D" << endl;  
  while ( cin >> i )
  {
     cout << "'"
          << add_thousands_separator(i)       << "' == \""
          << add_thousands_separator(i, '.')  << '"' << endl;
  }
  cout << "Done." << endl;
   
  return 0;
}