// Rationalv3.cpp

using namespace std;
#include "Rationalv3.h"

bool Rational::set(const int n, const int d)
{
  if (d != 0) {
    num_ = n;
    den_ = d;
    return true;
  }
  else
    return false;
}

Rational operator+(const Rational &r1, const Rational &r2)
{
  int num, den;
  
  num = r1.num() * r2.den() + r2.num() * r1.den();
  den = r1.den() * r2.den();
  return Rational(num, den);
}

std::istream& operator>>(std::istream &is, Rational &r)
{
  char c;
  
  is >> r.num_ >> c >> r.den_;
  return is;
}

std::ostream& operator<<(std::ostream &os, const Rational &r)
{
  os << r.num() << "/" << r.den();
  return os;
}