#include <iostream>
using namespace std;

class Number
{
    public:
        // Implicit CTOR since we didn't define one
        // Non initialized member
        int notGood;
        
        virtual void f(){}
};

// isGood.notGood will be 0;
Number isGood;

int main()
{
    Number wontWork;
    cout << wontWork.notGood << endl;
    cout << isGood.notGood << endl;
    return 0;
}