#include <iostream>
    using namespace std;
    class ParentClass
    {
        public:
        ParentClass(void) 
        {     
            cout << "Parent()\n";
        }
        ParentClass(int k) 
        { 
            cout << "Parent("<< k << ")\n"; 
        };
        ParentClass(void) 
        { 
            cout << "~Parent()\n";
        }; 
    };
    class ChildClass1 : public ParentClass{ };
    class ChildClass2 : public ParentClass
    {
        public:
        ChildClass2 (void) 
        {
            cout << "Child2()\n";
        }
        ChildClass2 (int k) : ParentClass(k) 
        {
            cout << "Child2(" << k << ")\n"; 
        }
        ~ChildClass2 (void) 
        {
            cout << "~Child2()\n"; 
        }
    };
    int main (void)
    {
        ChildClass1 obj1;
        ChildClass2 obj2;
        ChildClass2 obj3(69);
        return 0;
    }