#include<iostream>
using namespace std;

template<class T>
class demo {
	T val1;
	T val2;
public:
	demo(T v1, T v2) : val1(v1), val2(v2) {}

	T add(){
		return val1 + val2;
	}

};

int main(){
	demo<int> a(3, 4);
	demo<string> b("fox ", "bison");

	cout << a.add() << "  " << b.add() << endl;
	cout << sizeof(a) << "  " << sizeof(b) << endl;

	return 0;
}