/* 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>
// primary template to compute 3 to the Nth
template<int N>
class Pow3 {
public:
enum { result = 3 * Pow3<N-1>::result };
};
// full specialization to end the recursion
template<>
class Pow3<0> {
public:
enum { result = 1 };
};
int main()
{
std::cout << "Pow3<7>::result = " << Pow3<7>::result
<< '\n';
}
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