// This code should work after you implement your range function and
// correct the calls below!

    cout << "[ ";
    switch (argc)
    {
      case 2: // One parameter
        for ( int i : range( /* arg 1 */ )
          cout << i << " ";
        break;
        
      case 3: // Two parameters
        for ( int i : range( /* arg 1 */,
                             /* arg 2 */ )
          cout << i << " ";        
        break;
        
      case 4: // Three parameters
        for ( int i : range( /* arg 1 */,
                             /* arg 2 */,
                             /* arg 3 */ )
          cout << i << " ";
        break;
    }
    cout << "]" << endl;