/* A quick little program to demonstrate operator overloading in CPP In this program we make a Point class, and overload the plus operator so we can easily add the points together and control how the plus operator behaves with our custom class */ //iostream is needed for the output in the program #include //needed to used the standard namespace without having to //type std:: over and over again using namespace std; //A point class that stores x and y values for the point class Point { public: float x; float y; //Overloaded + operator declaration //note the syntax RETURNTYPE "operator" THE_OPERATOR_BEING_OVERLOADED (INPUT PARAMETERS) //See below for the implementation of the + operator overload function Point operator+(const Point& secondPoint); //Print method declaration void Print(); }; //+ Operator overload implementation. //This method recieves a reference to a point called secondPoint //adds the points together, adding the x values of both points //together and the y values of both points together, stores them //in a new point object and returns that new point //You will see later in the main function that you will call this //method with the format newPoint = point1 + point2 //this method is called as part of point1 in this case, passes in //point 2, adds them, and returns the sum into the new point Point Point::operator+(const Point& secondPoint) { //new point object to return at the end Point newPoint; //add the values of this objects x value and secondPoint's x value //and store in newPoint's x value newPoint.x = x + secondPoint.x; //add the values of this objects y value and secondPoint's y value //and store in newPoint's y value newPoint.y = y + secondPoint.y; // return the new point. return newPoint; } //Print implementation void Point::Print() { cout << "(" << x << "," << y << ")" << endl; } int main() { //create a point and assign values Point point1; point1.x = 1.0f; point1.y = 2.0f; //create a point and assign values Point point2; point2.x = 5.0f; point2.y = 6.0f; //create a point and add the values together //using our overloaded + operator Point point3; point3 = point1 + point2; //print out our points to make sure they worked point1.Print(); point2.Print(); point3.Print(); }

CPP Operator Overloading Example