View difference between Paste ID: 4swXNchR and Sqf5KS5B

 #include <numeric>
 
 using namespace std;
 
 class Rational {
 public:
     Rational() = default;
 
     Rational(int numerator)
 
         :numerator_(numerator)
     {
         denominator_ = 1;
     }
 
     Rational(int numerator, int denominator)
 
         :numerator_(numerator), denominator_(denominator)
 
     {
         Normalize();
     }
 
     int Numerator() const {
         return numerator_;
     }
 
     int Denominator() const {
         return denominator_;
     }
 
 private:
     void Normalize() {
         if (denominator_ < 0) {
             numerator_ = -numerator_;
             denominator_ = -denominator_;
         }
         const int divisor = gcd(numerator_, denominator_);
         numerator_ /= divisor;
         denominator_ /= divisor;
     }
 
     int numerator_ = 0;
     int denominator_ = 1;
 };