What will be the output of the following program?

#include<iostream.h> 
class CuriousTabBase
{
    public:
    int x, y;
    CuriousTabBase(int xx = 0, int yy = 5)
    {
        x = ++xx; 
        y = --yy;
    }
    void Display()
    {
        cout<< --y;
    } 
    ~CuriousTabBase(){} 
};
class CuriousTabDerived : public CuriousTabBase
{
    public:
    void Increment()
    {
        y++;
    }
    void Display()
    {
        cout<< --y;
    } 
}; 
int main()
{
    CuriousTabDerived objCuriousTab;
    objCuriousTab.Increment();
    objCuriousTab.Display();
    return 0; 
}

#include<iostream.h> 
class CuriousTabTest
{
    public:
    CuriousTabTest(int &x, int &y)
    {
        x++;
        y++;
    } 
};
int main()
{
    int a = 10, b = 20;
    CuriousTabTest objBT(a, b); 
    cout<< a << " " << b; 
    return 0; 
}

#include<iostream.h> 
class CuriousTab
{
    int *p; 
    public:
    CuriousTab(int xx, char ch)
    {
        p  = new int(); 
        *p = xx + int(ch); 
        cout<< *p;
    }
    ~CuriousTab() 
    {
        delete p;
    }
};
int main()
{
    CuriousTab objCuriousTab(10, 'B'); 
    return 0;
}

#include<iostream.h> 
struct MyData
{
    public:
    int Addition(int a, int b = 10)
    {
        return (a *= b + 2);
    }
    float Addition(int a, float b);
};
int main()
{
    MyData data;
    cout<<data.Addition(1)<<" ";
    cout<<data.Addition(3, 4);
    return 0; 
}

1. All operators can be overloaded in C++.
2. We can change the basic meaning of an operator in C++.