What will be the output of the following program?

#include<iostream.h> 
class Number
{
    int Num; 
    public:
    Number(int x = 0)
    {
        Num = x;
    }
    void Display(void)
    {
        cout<< Num;
    }
    void Modify(); 
};
void Number::Modify()
{
    int Dec;
    Dec = Num % 13; 
    Num = Num / 13; 
    
         if(Num  > 0 ) Modify()   ; 
         if(Dec == 10) cout<< "A" ; 
    else if(Dec == 11) cout<< "B" ; 
    else if(Dec == 12) cout<< "C" ; 
    else if(Dec == 13) cout<< "D" ;
    else               cout<< Dec ;
}
int main()
{
    Number objNum(130);
    objNum.Modify();
    return 0; 
}

#include<iostream.h> 
class CuriousTab
{
    int x, y; 
    public:
    CuriousTab(int xx = 10, int yy = 20 )
    {
        x = xx; 
        y = yy;
    }
    void Display()
    {
        cout<< x << " " << y << endl;
    } 
    ~CuriousTab()
    { } 
};
int main()
{
    CuriousTab objCuriousTab; 
    objCuriousTab.Display(); 
    return 0;
}

#include<iostream.h> 
class CuriousTabBase
{
    public:
        float x; 
}; 
class CuriousTabDerived : public CuriousTabBase
{
    public: 
        char ch; 
        void Process()
        {
            ch = (int)((x=12.0)/3.0);
        }
        void Display()
        {
            cout<< (int)ch;
        } 
}; 
int main()
{
    class CuriousTabDerived  *objDev = new CuriousTabDerived;
    objDev->Process();
    objDev->Display();
    return 0; 
}