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

template <typename T>
ostream& print(ostream &os,const T &t)
{
    os<<t;
    return os;
}

template <typename T,typename ... Args>
ostream& print(ostream &os,const T &t,const Args&...rest)
{
    os<<t<<" , ";
    return print(os,rest...);
}

int main()
{
    print(cout,1,3.14,"hello");
}