/* 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. */#ifndef LOOP2_HPP#define LOOP2_HPP// primary templatetemplate <int DIM, typename T>class DotProduct {  public:    static T result (T* a, T* b) {        return *a * *b  +  DotProduct<DIM-1,T>::result(a+1,b+1);    }};// partial specialization as end criteriatemplate <typename T>class DotProduct<1,T> {  public:    static T result (T* a, T* b) {        return *a * *b;    }};// convenience functiontemplate <int DIM, typename T>inline T dot_product (T* a, T* b){    return DotProduct<DIM,T>::result(a,b);}#endif // LOOP2_HPP