3. The need for struct pointer

• To make normalize() work with the original rect instantiated by main(), we must pass the object by pointer:

  
      void normalize( Rectangle* ptr_rect )
      {
          (*ptr_rect).set_dimensions( 1, 1 );
      }
  
  

• Note that the pointer has to be dereferenced (*ptr_rect) before accessing the rectange in memory.

• Alternatively, a member selector operator -> is typically used with pointers to structs, because it makes code more readable:

  
      void normalize( Rectangle* ptr_rect )
      {
          ptr_rect->set_dimensions( 1, 1 );
      }