/* The following code example is taken from the book * "C++ Templates - The Complete Guide" * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002 * * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include <iostream>class Empty {    typedef int Int;  // typedef members don't make a class nonempty};class EmptyToo : public Empty {};class EmptyThree : public EmptyToo {};int main(){    std::cout << "sizeof(Empty):      " << sizeof(Empty)              << '\n';    std::cout << "sizeof(EmptyToo):   " << sizeof(EmptyToo)              << '\n';    std::cout << "sizeof(EmptyThree): " << sizeof(EmptyThree)              << '\n';}