310                                      _________ 10. 

.print(); b2.print(); dl.print(); d2.print();

bl.print("bl.i = "); b2.print("b2.i = ");

dl.print("dl.i = "); d2.print("d2.i = ");

pb = pd;

pb -> print(); pb -> print("d2.i = ");

pd -> print(); pd -> print("d2.i = ");

}

15.    person (),   -
 ,  , ,  , .  
 :

class student : virtual public person { //
II.....     
};

class worker : virtual public person { //
//     
};

class student_worker : public student, public worker{

II.....  

};

 ,         
 .        -
   , ,     -
.          ,
  ?

16. ()      
(GUI, graphical user interface)   -.    
        GUI.
   Interviews,     X-
Window    C++.     
  .       -
    (,  ,   -
 10.5,   ,  . 293).  , 
     ,  
.         -
      ,   ? -
      .   
     ,     -
      .