Write a class definition for Point, which represents a point in the Cartesian coordinate system (i.e., x and y). Your Point class should include a default constructor and the following member function:

// set the point to values x, y

void set ( double x, double y );

Overload the << operator to display the point's coordinates.

Then write a small main function that uses a variable of type Point, sets it to the coordinates ( 2.5, 4 ) , and displays its coordinates on cout.

---

#include 

       using namespace std;



class Point {

public:

   Point() {}

   void set( double, double );

private:

   double x, y;

friend ostream& operator<< ( ostream&, const Point& );

};



//

// Set x, y coordinates of a point

//

void Point::set( double xVal, double yVal )

{

   x = xVal;

   y = yVal;

}



//

// Display a Point object

//

ostream& operator<< ( ostream& out, const Point& pt )

{

   out << "(x, y) = (" << pt.x << ", " << pt.y << ")";



   return out;

}



int main()

{

   Point onePt;



   onePt.set( 2.5, 4 );

   cout << onePt << endl;



   return 0;

}