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

class base {
	int b;
public:
	base(int init_b): b {init_b} {cout << "constructing base\n";}

	/* virtual */ ~base() {cout << "destructing base\n";}

	virtual void f() const {cout << "f\n";}
};

#endif