U6P4

Write a C++ program demonstrating use of the pure virtual function with the use of base and derived classes.

Code : 

 #include<iostream.h>  
 #include<conio.h>  
 class base  
 {  
      public:  
      int a;  
      virtual void show()=0;  
 };  
 class derived : public base  
 {  
      int b;  
      void show()  
      {  
           cout<<"Enter A : ";  
           cin>>a;  
           cout<<"Enter B : ";  
           cin>>b;  
           cout<<"\nSimple Addtion : "<<a+b;  
      }  
 };  
 void main()  
 {  
      clrscr();  
      cout<<"Program demonstrates the use of Pure Virtual Function.\n";  
      base *z=new derived();  
      z->show();  
      getch();  
 }  

Output :