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

#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> 
int CuriousTabFunction(int m)
{
    m *= m;
    return((10)*(m /= m)); 
}
int main()
{
    int c = 9, *d = &c, e;
    int &z = e;
    e = CuriousTabFunction(c-- % 3? ++*d :(*d *= *d));
    z = z + e / 10;
    cout<< c << " " << e;
    return 0;
}

#include<iostream.h> 
int main()
{
    float Amount;
    float Calculate(float P = 5.0, int N = 2, float R = 2.0);
    Amount = Calculate(); 
    cout<< Amount << endl; 
    return 0;
}

float Calculate(float P, int N, float R)
{
    int Year = 1;
    float Sum = 1 ;
    Sum = Sum * (1 + P * ++N * R);
    Year =  (int)(Year + Sum);
    return Year; 
}