#include <iostream.h>
#include <string>

class Student
{
public:
  Student(const string &n, const string&s, int a);
  void display();
  int get_age () const { return age; }
private:
  string name;
  string ssn;
  int age;
};

/*** NON MEMBER overloading ... ***/
int operator+(const Student&a, const Student&b)
{
  return a.get_age() + b.get_age();

}

Student::Student (const string &n, const string&s, int a)
{
  name = n; ssn = s; age = a;
}

void Student::display()
{
  cout << "Name: " << name << endl 
       << "SSN: " << ssn << endl
       << "Age: " << age << endl;
}

main ()
{
  Student x ("John", "222", 23),
    y("Jane", "333", 20);

  x.display();
  y.display();

  cout << "SUM OF 2 Students: " << x + y << endl;

}