Operator Overloading in struct

Question

Suppose I define this structure:

struct Point {
   double x, y;
};

How can I overload the + operator so that, declared,

Answer 1

This will also work:

struct Point{
    double x,y;
    Point& operator+(const Point& rhs){ 
            x += rhs.x;
            y += rhs.y;
            return *this;
    }
}