#include<iostream>
using namespace std;
class B
{
public:
    B(int i) {
        x = i;
        cout << "Constructor of B" << endl;
    }
    ~B()
    {
        cout << "Destructor of B" << endl;
    }
    void show()
    {
        cout << "x=" << x << endl;
    }
private:
    int x;
};
class D :public B
{
public :
    D(int i, int j, int k) :B(j), d(k)
    {
        cout << "Constructor of D" << endl;
    }
    ~D()
    {
        cout << "Destructor of D" << endl;
    }
    void show1()
    {
        cout << "d=" <<endl;
    }
private:
    B d;
};
int main()
{
    D obj(4, 5, 6);
    obj.show();
    return 0;
}