Virtual Function

[Ritchie]

wap using virtual function.

also wap using pointers.

[Banfa]

What do you mean by WAP?

[Ritchie]

What do you mean by WAP?

simple , it stands for write a program.

can u help me out asap,i mean as soon as possible

[Banfa]

simple , it stands for write a program.

well normally it stands for Wireless APplication

Do you know what a virtual function is? Do you know what pointers are?

What would you like you program to do?

[Ritchie]

well normally it stands for Wireless APplication

Do you know what a virtual function is? Do you know what pointers are?

What would you like you program to do?

yes sir,
i very well know wat pointers nd virtual functions are,but d thing is i havent touched c++ for over 2 yrs. now.so,i'm starting it all over again.

[Velhari]

yes sir,
i very well know wat pointers nd virtual functions are,but d thing is i havent touched c++ for over 2 yrs. now.so,i'm starting it all over again.

Hi,
Virtual Function is simple one.... we used similar method names in base class and subclass means, we propose to use virtual function(Run-time Polymorphism).. ....

So, c++ determines which function to use at runtime based on the Object pointed by the Base Pointer rather than type of Pointer.

Here is a simple program for you to understand the concept of Virtual function

#include <iostream.h>

class virtual_example
{
      virtual void show()
      {
            cout<<"Base Class";
      }
}
class sub extends virtual_example
{
     void show()
     {
          cout<<"Derived Class";
     }
}
void main()
{
         virtual_example *v; //Base Pointer
         virtual_example start;
         sub end;
 
         v=&start;
         v->show();
 
         v=&end;
         v->show();
}

With Regards,
Velmurugan.H

[Ritchie]

Hi,
Virtual Function is simple one.... we used similar method names in base class and subclass means, we propose to use virtual function(Run-time Polymorphism).. ....

So, c++ determines which function to use at runtime based on the Object pointed by the Base Pointer rather than type of Pointer.

Here is a simple program for you to understand the concept of Virtual function

#include <iostream.h>

class virtual_example
{
      virtual void show()
      {
            cout<<"Base Class";
      }
}
class sub extends virtual_example
{
     void show()
     {
          cout<<"Derived Class";
     }
}
void main()
{
         virtual_example *v; //Base Pointer
         virtual_example start;
         sub end;
 
         v=&start;
         v->show();
 
         v=&end;
         v->show();
}

With Regards,
Velmurugan.H

thnx a lot.