What will be the out of the following program?

#include<iostream.h> 
class CuriousTabBase
{
    protected:
    int x, y; 
    public:
    CuriousTabBase(int xx = 0, int yy = 0)
    {
        x = xx;
        y = yy; 
    } 
    void Show()
    {
        cout<< x * this->y << endl;
    }
};
class CuriousTabDerived
{
    private:
        CuriousTabBase objBase; 
    public:
    CuriousTabDerived(int xx, int yy) : objBase(xx, yy)
    {
        objBase.Show();
    } 
    ~CuriousTabDerived()
    { }
};
int main()
{
    CuriousTabDerived objDev(10, 20); 
    return 0;
}

class Birds {};
class Peacock : protected Birds {};

#include<iostream.h> 
int main()
{
    int x = 80; 
    int &y = x;
    x++;
    cout << x << " " << --y;
    return 0;
}

#include<iostream.h> 
class A
{
    public:
    void CuriousTabFunction(void)
    {
        cout<< "Class A" << endl;
    }
};
class B: public A
{
    public:
    void CuriousTabFunction(void)
    {
        cout<< "Class B" << endl;
    } 
};
class C : public B
{
    public:
    void CuriousTabFunction(void)
    {
        cout<< "Class C" << endl;
    } 
};
int main()
{
    A *ptr;
    B objB;
    ptr = &objB;
    ptr = new C();
    ptr->CuriousTabFunction();
    return 0; 
}