#include<iostream.h>
 #include<conio.h>

 /*************************************************************************///------------------------------  base  ---------------------------------///*************************************************************************/classbase
    {
       public:
        void show()  { cout<<"base class"<<endl;  }
    };

 /*************************************************************************///-----------------------------  derv_1  --------------------------------///*************************************************************************/class derv_1:publicbase
    {
       public:
        void show()  { cout<<"derv_1 class"<<endl;  }
    };

 /*************************************************************************///------------------------------  derv_2  -------------------------------///*************************************************************************/class derv_2:publicbase
    {
       public:
        void show()  { cout<<"derv_2 class"<<endl;  }
    };


 main()
    {
       clrscr();

       base b_obj;

       b_obj.show();

       derv_1 d_1_obj;
       derv_2 d_2_obj;

       d_1_obj.show();
       d_2_obj.show();

       getch();
       return 0;
    }