C++ Programming - Functions - Discussion

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