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

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