initial check in

dyn_cast.cpp

@@ -0,0 +1,46 @@
+
+#include <stdio.h>
+
+class A
+{
+public: virtual void* getThis()
+{ return this; }
+};
+
+class B : virtual public A
+{
+public: virtual void* getThis()
+{ return this; }
+
+public: virtual void printB()
+{ puts("B"); }
+};
+
+class C : virtual public A
+{
+public: virtual void* getThis()
+{ return this; }
+
+public: virtual void printC()
+{ puts("C"); } 
+};
+
+class D : public B,
+	  public C
+{
+public: virtual void* getThis()
+{ return this; }
+};
+
+int main ()
+{
+	D o;
+	B* pB = reinterpret_cast<B*>( o.getThis() );
+	C* pC = reinterpret_cast<C*>( o.getThis() );
+
+	pB->printB();
+	pC->printC();
+
+	return 0;
+}
+