Write a C++ program illustrates Abstract class and Pure virtual function.

#include <iostream.h> 
 #include <conio.h> 
 const int max = 80; 
 class first 
 { 
            protected: 
                              char name[max]; 
                              char cls [max] ; 
            public: 
                              virtual void insert()=0; 
                              virtual void show()=0; 
 }; 
      class second: public first 
      { 
            protected: 
                              int fees; 
            public: 
                              void insert() 
                        { 
                             cout<<"Name "; 
                             cin>>name; 
                             cout<<"Class "; 
                             cin>>cls; 
                             cout<<"Fees "; 
                             cin>>fees; 
                        } 
                            void show() 
                       { 
                           cout<<"\nName : "<<name<<"\n"; 
                           cout<<"Class: "<<cls<<"\n"; 
                           cout<<"Fees : "<<fees<<"\n"; 
                       } 
    }; 
                void main() 
        { 
               clrscr();   
               second s1; 
               s1.insert(); 
               s1.show(); 
               getch(); 
        }