E-Sources Informatics

ALGORITHM:

Step 1: Start the program.
Step 2: Declare the base class base.
Step 3: Declare and define the virtual function show().
Step 4: Declare and define the function display().
Step 5: Create the derived class from the base class.
Step 6: Declare and define the functions display() and show().
Step 7: Create the base class object and pointer variable.
Step 8: Call the functions display() and show() using the base class object and pointer.
Step 9: Create the derived class object and call the functions display() and show() using the derived class object and pointer.
Step 10: Stop the program.

PROGRAM:

#include<iostream.h> #include<conio.h> class base {     public:       virtual void show()       {                 cout<<"\n  Base class show:";       }       void display()       {               cout<<"\n  Base class display:" ;       } };   class drive:public base {    public:       void display()       {               cout<<"\n  Drive class display:";       }       void show()       {               cout<<"\n  Drive class show:";       } };   void main() {    clrscr();    base obj1;    base *p;    cout<<"\n\t P points to base:\n"   ;      p=&obj1;    p->display();    p->show();      cout<<"\n\n\t P points to drive:\n";    drive obj2;    p=&obj2;    p->display();    p->show();    getch(); }

Output:

P points to Base
Base class display
Base class show
P points to Drive
Base class Display
Drive class Show