#include <iostream>

using namespace std;

class Rational {
private:
  int num, den;
public:
  Rational(); 
  Rational(int n, int d);
  void reduce();
  Rational sum(const Rational &b) const;
  Rational operator+(const Rational &b) const;

  double operator+(double b) const;

  Rational operator*(const Rational &b) const;
  bool gt(const Rational &b) const;
  bool operator>(const Rational &b) const;
  void display() const;
  double real() const;
};

double operator+(double a, const Rational &b);