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

#include<iostream.h> 
class PowerFinder
{
    public:
    void Power(int x = 1, int y = 1)
    {
        int P = 1, i = 1;
        while(++i <= y)
        {
            P *= x;
        }
        cout<< P << endl; 
    } 
};
int main()
{
    PowerFinder FP; 
    FP.Power(2, 6); 
    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; 
}

#include<iostream.h> 
class TestDrive
{
    int x; 
    public:
    TestDrive(int xx)
    {
        x = xx;
    }
    int DriveIt(void);
};
int TestDrive::DriveIt(void)
{
    static int value = 0;
    int m;
    m = x % 2;
    x = x / 2;
    if((x / 2)) DriveIt(); 
    value = value + m * 10; 
    return value;
}
int main()
{
    TestDrive TD(1234);
    cout<< TD.DriveIt() * 10 << endl;
    return 0; 
}

#include<iostream.h>
class CuriousTab
{
    int x, y, z; 
    public:
    CuriousTab(int x = 100, int y = 30, int z = 0)
    {
        this->x = x; 
        this->y = y;
        this->z = z; 
        Display();
    }
    void Display()
    {
        cout<< x << " " << y << " " << z;
    }
};
int main()
{
    int a = 0, b = 1, c = 2; 
    int &x = ++a; 
    int &y = --b; 
    int z = c + b - -c; 
    CuriousTab objCuriousTab(x, y, z); 
    return 0; 
}

#include<iostream.h>
#include<string.h>
#include<malloc.h>
class CuriousTabString
{
    char txtName[20]; 
    public:
    CuriousTabString(char *txtTemp = NULL)
    {
        if(txtTemp != NULL)
        strcpy(txtName, txtTemp);
    }
    void Display(void)
    {
        cout<<txtName;
    }
};
int main()
{
    char *txtName = (char*)malloc(10);
    strcpy(txtName, "CuriousTab");
    *txtName = 48;
    CuriousTabString objTemp(txtName);
    cout<< sizeof(txtName);
    return 0; 
}

#include<iostream.h> 
class CuriousTab
{
    public: 
    int x, y;
    CuriousTab(int xx = 10, int yy = 20)
    {
        x = xx;
        y = yy; 
    }
    void Exchange(int *, int *);
};
int main()
{
    CuriousTab objA(30, 40); 
    CuriousTab objB(50); 
    objA.Exchange(&objA.x, &objB.y); 
    cout<< objA.x << " " << objB.y << endl; 
    return 0;
}
void CuriousTab::Exchange(int *x, int *y)
{
    int t;
    t  = *x;
    *x = *y;
    *y = t ; 
}

#include<iostream.h> 
class BaseCounter
{
    protected:
    long int count;

    public:
    void CountIt(int x, int y = 10, int z = 20)
    {
        count = 0;
        cout<< x << " " << y << " " << z << endl;
    } 
    BaseCounter()
    {
        count = 0;
    }
    BaseCounter(int x)
    {
        count = x ;
    } 
}; 
class DerivedCounter: public BaseCounter
{
    public:
    DerivedCounter()
    { }
    DerivedCounter(int x): BaseCounter(x) 
    { }
};
int main()
{
    DerivedCounter objDC(30); 
    objDC.CountIt(40, 50); 
    return 0; 
}

#include<iostream.h> 
class CuriousTabArray
{
    int array[3][3];
    public:
    CuriousTabArray(int arr[3][3] = NULL)
    { 
        if(arr != NULL)
        for(int i = 0; i < 3; i++) 
            for(int j = 0; j < 3; j++) 
                array[i][j] = i+j; 
    } 
    void Display(void)
    {
        for(int i = 0; i < 3; i++) 
            for(int j = 0; j < 3; j++)
                cout<< array[i][j] << " "; 
    }
};
int main()
{
    CuriousTabArray objBA;
    objBA.Display();
    return 0; 
}

#include<iostream.h> 
void MyFunction(int a, int b = 40)
{
    cout<< " a = "<< a << " b = " << b << endl;
}
int main()
{
    MyFunction(20, 30);
    return 0; 
}

#include<iostream.h> 
typedef void(*FunPtr)(int);
int Look(int = 10, int = 20);
void Note(int); 
int main()
{
    FunPtr ptr = Note;
    (*ptr)(30); 
    return 0;
}
int Look(int x, int y)
{
    return(x + y % 20);
}
void Note(int x)
{
    cout<< Look(x) << endl;
}

#include<iostream.h>
long GetNumber(long int Number)
{
    return --Number;
}
float GetNumber(int Number)
{
    return ++Number;
}
int main()
{
    int x = 20;
    int y = 30;
    cout<< GetNumber(x) << " ";
    cout<< GetNumber(y) ;
    return 0; 
}