C++ Programming - Functions - Discussion

#include<iostream.h> 
class IndiaBix
{
    int x, y, z; 
    public:
    void Apply(int xx = 12, int yy = 21, int zz = 9)
    {
        x = xx;
        y = yy += 10;
        z = x -= 2;
    }
    void Display(void)
    {
        cout<< x << " " << y << endl; 
    } 
    void SetValue(int xx, int yy)
    {
        Apply(xx, 0, yy);
    }
};
int main()
{
    IndiaBix *pBix= new IndiaBix;
   (*pBix).SetValue(12, 20);
    pBix->Display();
    delete pBix;
    return 0; 
}