python факториал

Ответ от Николай Веселуха[гуру]
#include <iostream>int factorial(int n) { int val = 1; for (int i = 1; i <= n; val *= i, ++i); return val; }int main() { std::cout << factorial(7) << std::endl; std::cin.get(); }//====================================================#include <iostream>int factorial(int n) { return (n == 0) ? 1 : n * factorial(n - 1); }int main() { std::cout << factorial(7) << std::endl; std::cin.get(); }//====================================================#include <iostream>template<int n> struct factorial { enum { val = factorial<n - 1>::val * n }; };template<> struct factorial<0> { enum { val = 1 }; };int main() { std::cout << factorial<7>::val << std::endl; std::cin.get(); }//====================================================#include <iostream>template<int n> class factorial { public: static const int val = factorial<n - 1>::val * n; };template<> class factorial<0> { public: static const int val = 1; };int main() { std::cout << factorial<7>::val << std::endl; std::cin.get(); }