1 #include <typeinfo>

     2 #include <iostream>

     3 

     4 using namespace std;

     5 

     6 class A {

     7   public:

     8     void f () {

     9         cout << "Ich bin f() in der Klasse A\n";

    10     }

    11 };

    12 

    13 class B:public A {

    14   public:

    15     void f () {

    16         cout << "Ich bin f() in der Klasse B\n";

    17     }

    18 };

    19 

    20 class C {

    21   public:

    22     void f () {

    23         cout << "Ich bin auch ein f()\n";

    24     }

    25 };

    26 

    27 int main ()

    28 {

    29     A *ap = new A ();

    30     B *bp = new B ();

    31 

    32     // instanceof

    33     C *cp = dynamic_cast < A * >(bp);

    34     if (cp != NULL)

    35         cp->f ();

    36 

    37     return 0;

    38 }