View difference between Paste ID: GEajLdzj and 3Bxr0vam

 #include <numeric>
 #include <vector>
 #include <iostream>
 
 
 using namespace std;
 
 class Rational {
 public:
 
     Rational() = default;
 
     Rational(int value){
         numerator_ = value;
     }
 
     Rational(int numerator, int denominator){
         if(denominator<0){
             denominator*=(-1);
             numerator*=(-1);
         }
         int greatest_common_divisor = gcd(numerator, denominator);
         numerator_ =  numerator/greatest_common_divisor;
         denominator_ = denominator/greatest_common_divisor;
     }
 
     int Numerator() const {
         return numerator_;
     }
 
     int Denominator() const {
         return denominator_;
     }
 
 private:
     int numerator_ = 0;
     int denominator_ = 1;
 };
 
 Rational Add(Rational r1, Rational r2) {
     int numerator = r1.Numerator() * r2.Denominator() + r2.Numerator() * r1.Denominator();
     int denominator = r1.Denominator() * r2.Denominator();
     // Создаём и возвращаем дробь с заданным числителем и знаменателем
     return Rational{numerator, denominator};
 }
 
 int main() {
     Rational zero;                   // Дробь 0/1 = 0
     const Rational seven(7);         // Дробь 7/1 = 7
     const Rational one_third(1, 3);  // Дробь 1/3
     vector<Rational> numbers;
     numbers.push_back(Rational{7, 8});
     // Следующие 2 строки эквивалентны - добавляют в numbers дробь 3/1
     numbers.push_back(Rational{3});
     numbers.push_back(3);
     Rational sum = Add(Rational{1,6}, one_third);
     // Выведет 1/2
     cout << sum.Numerator() << "/" << sum.Denominator();
 }