Which of the following statement is correct about the program given below?

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

#include<iostream.h> 
class Point
{
    int x, y; 
    public:
    Point(int xx = 10, int yy = 20)
    {
        x = xx;
        y = yy; 
    }
    Point operator + (Point objPoint)
    {
        Point objTmp;
        objTmp.x = objPoint.x + this->x; 
        objTmp.y = objPoint.y + this->y;
        return objTmp;
    }
    void Display(void)
    {
        cout<< x << " " << y;
    }
};
int main()
{
    Point objP1;
    Point objP2(1, 2);
    Point objP3 = objP1 + objP2;
    objP3.Display(); 
    return 0; 
}

#include<iostream.h>
#include<string.h> 
class CuriousTab
{
    int val; 
    public:
    void SetValue(char *str1, char *str2)
    {
        val = strcspn(str1, str2);
    }
    void ShowValue()
    {
        cout<< val;
    } 
};
int main() 
{
    CuriousTab objCuriousTab;
    objCuriousTab.SetValue((char*)"India", (char*)"CuriousTab"); 
    objCuriousTab.ShowValue(); 
    return 0; 
}

#include<iostream.h> 
class India
{
    public:
    struct CuriousTab
    {
        int   x;
        float y;
        void Function(void)
        {
            y = x = (x = 4*4); 
            y = --y * y;
        }
        void Display()
        {
            cout<< y << endl;
        } 
    }B; 
}I; 
int main()
{
    I.B.Display(); 
    return 0;
}

#include<iostream.h> 
class CuriousTab
{
    static int x; 
    public:
    static void SetData(int xx)
    {
        this->x = xx; 
    }
    static void Display() 
    {
        cout<< x ;
    }
};
int CuriousTab::x = 0; 
int main()
{
    CuriousTab::SetData(22);
    CuriousTab::Display();
    return 0; 
}

#include<iostream.h> 
class CuriousTabSample
{
    private:
    int AdditionOne(int x, int y = 1) 
    {
        return x * y;
    }
     
    public:
    int AdditionTwo(int x, int y = 1)
    {
        return x / y;
    } 
}; 
int main()
{
    CuriousTabSample objCuriousTab;
    cout<<objCuriousTab.AdditionOne(4, 8)<<" "; 
    cout<<objCuriousTab.AdditionTwo(8, 8); 
    return 0;
}

#include<iostream.h>
#include<process.h> 
class CuriousTab
{
    static int x; 
    public:
    CuriousTab()
    {
        if(x == 1)
            exit(0); 
        else
            x++;
    }
    void Display()
    {
        cout<< x << " ";
    }
};
int CuriousTab::x = 0; 
int main()
{
    CuriousTab objCuriousTab1; 
    objCuriousTab1.Display(); 
    CuriousTab objCuriousTab2; 
    objCuriousTab2.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; 
}

#include<iostream.h> 
class CuriousTabData
{
    int x, y, z; 
    public:
    CuriousTabData(int xx, int yy, int zz)
    {
        x = ++xx;
        y = ++yy;
        z = ++zz;
    }
    void Show()
    {
        cout<< "" << x++ << " " << y++ << " " << z++;
    } 
}; 
int main()
{
    CuriousTabData objData(1, 2, 3);
    objData.Show();
    return 0; 
}

#include<iostream.h>
#include<string.h> 
class CuriousTab
{
    public:
    void GetData(char *s, int x, int y )
    {
        int i = 0;
        for (i = x-1; y>0; i++)
        {
            cout<< s[i];
            y--; 
        } 
    }
}; 
int main()
{
    CuriousTab objCuriousTab;
    objCuriousTab.GetData((char*)"Welcome!", 1, 3);
    return 0; 
}

#include<iostream.h> 
class Tab
{
    public:
      int x;
};
int main()
{
    Tab *p = new Tab();

    (*p).x = 10;
    cout<< (*p).x << " " << p->x << " " ;

    p->x = 20;
    cout<< (*p).x << " " << p->x ;

    return 0;
}