class A
{
protected:
    int x;

public:
    A(int x = 5) : x(x + 1)
    {
        cout << "In A::A x=" << x << endl;
    }

    operator int() const { return x; }
};

void main()
{
     A a1(10);
     cout << a1 << endl ;
}

In A:: An x=11
11

In A:: An x=10
11