ostream& operator<<(ostream& outputStream, const Rational& r) {
    outputStream << r.Numerator() << "/" << r.Denominator();

    return outputStream;
}

istream& operator>>(istream& inputStream, Rational& r) {
    int numerator = 0;
    int denominator = 0;
    char op;

    inputStream >> numerator;
    inputStream >> op;
    inputStream >> denominator;    

    if (!inputStream.fail() && op == '/') {
        r = Rational(numerator, denominator);
    } else if(inputStream.fail() && !inputStream.eof()) {
        inputStream.clear();
    } 

    return inputStream;
}