#ifndef BASEH
#define BASEH
#include <iostream>
using namespace std;

class base {
	int i;
protected:
	virtual void print(ostream& os) const {os << i;}
public:
	base(int initial_i): i(initial_i) {}
	virtual ~base() {}

	friend ostream& operator<<(ostream& ost, const base& b) {
		b.print(ost);
		return ost;
	}
};
#endif