Controlling object creation

• Objects will be more useful if:

  • we can control the semantics of instantiation (read: declaring) them.

• The goal is to provide the client with objects which are always in a good (or at least identifiably bad) state:

  
      #include "point.h"
      void main()
      {
          Point pt( 5, 10 ); // construct object with initial values
      }