initial check in

virtual_method_ptr.cpp

@@ -0,0 +1,81 @@
+
+#include <stdio.h>
+
+class A
+{
+public:
+	typedef void (A::*virt_method_ptr)();
+
+	virt_method_ptr m_pMethod;
+
+public:
+	A()
+	{
+		m_pMethod = &A::func1;
+	}
+
+	void call_method_through_ptr()
+	{
+		(this->*m_pMethod)();
+	}
+
+	virtual void func1()
+	{
+		puts( "called A::func1()" );
+	}
+
+	virtual void func2()
+	{
+		puts( "called A::func2()" );
+	}
+
+	virtual void func3()
+	{
+		puts( "called A::func3()" );
+	}
+};
+
+class B : public A
+{
+public:
+	int nTestPrintMe;
+
+public: 
+	B( int n )
+	{
+		m_pMethod = reinterpret_cast<virt_method_ptr>(&B::func4);
+		nTestPrintMe = n;
+	}
+
+	virtual void func3()
+	{
+		puts( "called B::func3()" );
+	}
+
+	virtual void func4()
+	{
+		printf( "called B::func4( %d ) \n", nTestPrintMe );
+	}
+};
+
+int main ()
+{
+	A *o = new B( 10 );
+
+	o->call_method_through_ptr();
+
+	o->m_pMethod = &A::func1;
+	o->call_method_through_ptr();
+
+	o->m_pMethod = &A::func2;
+	o->call_method_through_ptr();
+
+	o->m_pMethod = &A::func3;
+	o->call_method_through_ptr();
+
+	o->m_pMethod = reinterpret_cast<A::virt_method_ptr>(&B::func4);
+	o->call_method_through_ptr();
+
+	return 0;
+}
+