Sum of Two Objects

#include <iostream>
using namespace std;

// class Distance;  // forward declaration

// class Point {
//  private:
//  int x;

//  public:
//   Point(int v) : x(v) {}
//   	// your code here: declare friend function sumValues
// };

// class Distance {
//  private:
//  	int d;

//  public:
//  	Distance(int v) : d(v) {}
//  	// your code here: declare friend function sumValues
// };

// // 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;
// }
class Distance; // Forward declaration so the compiler knows this class exists

class Point {
	private:
	int x;

	public:
		Point(int v): x(v){}

		friend void sumValues(const Point& p, const Distance& D);
};

class Distance{
	private:
	int d;

	public:
		Distance(int v): d(v){}

		friend void sumValues( const Point& p, const Distance& D);
};

void sumValues(const Point& p, const Distance& d){
	int result = p.x + d.d;
	cout<< "Sum="<<result << endl;
}


int main(){
	int a,b;
	cin >> a >>b;

	Point p(a);
	Distance dist(b);

	sumValues(p,dist);

	return 0;
}