What will be the output of the following program?

#include<iostream.h>
long CuriousTabFunction(int x, int y = 5, float z = 5)
{
    return(++x * ++y + (int)++z);
}
int main()
{
    cout<< CuriousTabFunction(20, 10); 
    return 0;
}

#include<iostream.h> 
class CuriousTab
{
    int x; 
    float y; 
    public:
    void CuriousTabFunction(int = 0, float = 0.00f, char = 'A');
    void CuriousTabFunction(float, int = 10.00, char = 'Z');
    void CuriousTabFunction(char, char, char);
};
int main()
{
    CuriousTab objCuriousTab;
    objCuriousTab.CuriousTabFunction(10 * 1.0, int(56.0)); 
    return 0;
}
void CuriousTab::CuriousTabFunction(int xx, float yy, char zz)
{
    x = xx + int(yy);
    cout<< "x = " << x << endl;
}
void CuriousTab::CuriousTabFunction(float xx, int yy, char zz)
{
    x = zz + zz;
    y = xx + yy;
    cout<< " x = " << x << endl;
}
void CuriousTab::CuriousTabFunction(char xx, char yy, char zz)
{
    x = xx + yy + zz; 
    y = float(xx * 2); 
    cout<< " x = " << x << endl;
}

#include<iostream.h> 
class CuriousTab
{
    int x, y; 
    public:
        CuriousTab()
        {
            x = 0;
            y = 0; 
        }
        CuriousTab(int xx, int yy)
        {
            x = xx;
            y = yy; 
        }
        CuriousTab(CuriousTab *objB)
        {
            x = objB->x;
            y = objB->y; 
        }
        void Display()
        {
            cout<< x << " " << y;
        }
};
int main()
{
    CuriousTab objCuriousTab( new CuriousTab(20, 40) );
    objCuriousTab.Display();
    return 0; 
}

#include<iostream.h> 
class Tab
{
    int x, y; 
    public:
    Tab(int x, int y)
    {
        this->x = x;
        this->y = y;
    }
    void Display()
    {
        cout<< x << " " << y;
    }
};
int main()
{
    int x = 50;
    int &y = x ;
    Tab b(y, x);
    return 0; 
}

1. An array of references is acceptable.
2. We can also create a reference to a reference.