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

       class BaseClass       //Abstract class
       {

              public:
               virtual void Display1()=0;     //Pure virtual function or abstract function
               virtual void Display2()=0;     //Pure virtual function or abstract function

               void Method3()
               {
                      cout<<"\n\tMethod3() is Base Class";
               }

       };

       class DerivedClass : public BaseClass
       {

              public:
               void Method1()
               {
                      cout<<"\n\tMethod1() is Derived Class";
               }

               void Method2()
               {
                      cout<<"\n\tMethod2() is Derived Class";
               }

       };

       void main()
       {

              DerivedClass D;

              D.Method1();            // This will invoke Method1() Derived Class
              D.Method2();            // This will invoke Method2() Derived Class
              D.Method3();            // This will invoke Method3() Base Class

       }