Sum of Two Objects

#include <iostream>
using namespace std;

class Distance;  // forward declaration

class Point {
 private:
 int x;

 public:
  Point(int v) : x(v) {}
  friend void sumValues(const Point& p, const Distance& d);
  	// your code here: declare friend function sumValues
};

class Distance {
 private:
 	int d;

 public:
 	Distance(int v) : d(v) {}
	friend void sumValues(const Point& p, const Distance& d);
 	// your code here: declare friend function sumValues
};

void sumValues(const Point& p, const Distance& d){ 
	int sum = p.x + d.d;
	cout << "Sum="<< sum << "\n";
	}
// your code here: define friend function sumValues

int main() {
	int a, b;
	cin >> a >> b;
	
	Point p(a);
	Distance dist(b);

	sumValues(p, dist);
	return 0;
}