5. Using C++ Objects

• Objects are C++ variables of user-defined types. They are declared as

  
      typename object_name;
  
  

• For example, if Shape3D is a user-defined type, then we could try

  
      Shape3D widget;               // create object named "widget"
  
      widget.display( parameters ); // call member function with parameters
  
      widget.reset( );              // call member function without parameters
  
  

• Dot-notation is used to access functions built into objects.

• Alternatively, some objects may allow use of arithmetic operators. For example,

  
      std::cout << widget;          // display widget on console output device