C++ Programming - References - Discussion

#include<iostream.h> 
class IndiaBix
{
    int x, y; 
    public:
    IndiaBix(int xx = 0, int yy = 0)
    {
        x = xx; 
        y = yy;
    }
    void Display()
    {
        cout<< x << " " << y;
    }
    IndiaBix operator +(IndiaBix z)
    {
        IndiaBix objTemp;
        objTemp.x = x + z.x;
        objTemp.y = y + z.y;
        return objTemp; 
    }
};
int main()
{
    IndiaBix objBix1(90, 80); 
    IndiaBix objBix2(10, 20); 
    IndiaBix objSum; 
    IndiaBix &objRef = objSum; 
    objRef = objBix1 + objBix2; 
    objRef.Display(); 
    return 0; 
}