C++ Programming - Objects and Classes

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

#include<iostream.h>
#include<string.h> 
class IndiaBix
{
    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()
{
    IndiaBix objBix;
    objBix.GetData((char*)"Welcome!", 1, 3);
    return 0; 
}

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

#include<iostream.h> 
class IndiaBix
{
    int x; 
    float y; 
    public:
    void Function()
    {
        x = 4; 
        y = 2.50; delete this;
    }
    void Display()
    {
        cout<< x << " " << y;
    } 
}; 
int main()
{
    IndiaBix *pBix = new IndiaBix();
    pBix->Function(); 
    pBix->Function(); 
    pBix->Display(); 
    return 0; 
}