#include <iostream>
using namespace std;

class myclass {
	int x;
public:
	myclass(){x = 0;}
	myclass(int n){x = n;}
	int getx(){return x;}
};

int main()
{
	myclass o1(10);
	myclass o2;
	
	cout << "o1: " << o1.getx() << "\n";
	cout << "o2: " << o2.getx() << "\n";
	
	return 0;
}