int f() { return 2;}
double f() { return 2.7;}

#include <cstdio>

template <typename typed> typed f() { return 2.7; }

int main(void) { return !printf("%d %f", f<int>(), f<double>()); }

#include <cstdio>

//template <typename typed> typed f() { return f<void>(); }
//template <typename typed> typed f() { return f<void>(); return f<int>(); }
template <typename typed> typed f();

template <> int f() { return 2; }
template <> double f() { return 2.7; }

int main(void) { return !printf("%d %f", f<int>(), f<double>()); }

template<typename T> T f();
template<> int f() { return 2; }
template<> double f() { return 2.7; }

int x1 = f<int>();
double y1 = f<double>();

struct F {
    F() {}
    template<typename T> operator T() { return f<T>(); }
};

int x2 = F();
double y2 = F();

auto a = F();

#include <iostream>

using namespace std;

namespace _double
{
    double f()
    {
        return 2.6;
    }
}
namespace _int
{
    int f()
    {
        return 2;
    }
}

int main()
{
    cout << _double::f() << " " << _int::f() << endl;
    cin.get();
    return 0;
}