#include <iostream>
#include <cstdlib>
using namespace std;

template <class T>
void g();

template <class T>
class wrapper {
	const T t;
public:
	wrapper(const T& initial_t = T()): t(initial_t) {}
	friend void f();
	friend void g<T>();

	template <class U>
	friend void h();
};

inline void f() {cout << wrapper<int>().t << "\n";}

template <class T>
inline void g() {cout << wrapper<T>().t << "\n";}

template <class U>
inline void h() {cout << U(wrapper<double>().t) << "\n";}

int main()
{
	cout << boolalpha << fixed;
	f();

	g<int>();
	g<double>();

	h<bool>();
	h<double>();
	return EXIT_SUCCESS;
}