4. The need for struct pointer, cont.

• The main() function must pass the original object by address:

  
  int main()
  {
      Rectangle rect( 333, 222 );
      normalize( &rect );
      std::cout << "rectangle width: " << rect.width << '\n';
      std::cout << "rectangle height: " << rect.height << '\n';
      std::cout << "rectangle area: " << rect.area() << '\n';
      return 0;
  }
  
  

• Recall that the & is the C/C++ "address-of" operator.