#include <iostream>
    using namespace std;
    class BaseClass
    {
        public:
        int x;
        BaseClass(int num=0)
        : x(num)
        {
            cout << "Base" << endl;
        }
    };
    class DerivedClass: public BaseClass
    {
        public:
        double y;
        DerivedClass(double d = 0.0)
        : y(d)
        {
            cout <<"Derived" << endl;
        }
    };
    int main()
    {
        cout << "Instantiating Base" << endl;
        BaseClass cBase;
        cout << "Instantiating Derived" << endl;
        DerivedClass cDerived;
        return 0;
    }