C++ Fibonacci

cpp-fibs.cpp

#include <iostream>

template< int N >
struct Fibonacci
{
    static constexpr int value = Fibonacci< N - 1 >::value + Fibonacci< N - 2 >::value;
};

template<>
struct Fibonacci< 1 >
{
    static constexpr int value = 1;
};

template<>
struct Fibonacci< 0 >
{
    static constexpr int value = 0;
};

int main( void )
{
    std::cout << Fibonacci< 40 >::value << std::endl;
    
    return 0;
}