Write a C++ program to illustrate virtual function.

Program Algorithm:
Step 1: Include the header files
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.




Program Code in C++:
#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();
}





Program Output:
P points to Base
Base class display
Base class show
P points to Drive
Base class Display
Drive class Show
Mukesh Rajput

Mukesh Rajput

I am a Computer Engineer, a small amount of the programming tips as it’s my hobby, I love to travel and meet people so little about travel, a fashion lover and love to eat food, I am investing a good time to keep the body fit so little about fitness also..

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