overloading derived class

Hey, first thanks a lot for your help guys!

I figured out what was wrong

Code:

---

class derived : public base
{
public:
        int i2;

        derived(int a1, int a2) : base(a1), i2(a2) {}
        derived(const derived &o) : base(o), i2(o.i2) {}
        derived &operator =(const derived &o) {
                base::operator=(o);
                i2 = o.i2;
                return *this;
        }
};

---

Forgot to pass reference of derived to base class in constructor..
Didnt expect this will happen.. whys that?

Because it is more consistent to say that uninitialized sub-objects are initialized with the default constructor in all constructor initialization lists than making a special exception for the copy constructor.