#include <iostream.h>
#include <conio.h>
class base
{
public:
virtual void vfunc()
{
cout << "This is
base's vfunc().\n";
}
};
class derived1 :
public base
{
public:
void vfunc()
{
cout << "This is
derived1's vfunc().\n";
}
};
/* derived2
inherits virtual function vfunc()
from derived1.
*/
class derived2 :
public derived1
{
public:
// vfunc() is
still virtual
void vfunc()
{
cout << "This
is derived2's vfunc().\n";
}
};
int main()
{
clrscr();
base *p, b;
derived1 d1;
derived2 d2;
// point to base
p = &b;
p->vfunc(); // access base's
vfunc()
// point to derived1
p = &d1;
p->vfunc(); // access derived1's
vfunc()
// point to derived2
p = &d2;
p->vfunc(); // access derived2's
vfunc()
getch();
return 0;
}
