Урок 3-2

kutuzzzov

Sep 6th, 2022 (edited)

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#include <vector>
#include <iostream>
#include <numeric>
using namespace std;
class Rational {
public:
Rational() = default;
Rational(int numerator)
: numerator_(numerator)
{}
Rational(int numerator, int denominator)
: numerator_(numerator), denominator_(denominator)
{
if (denominator_ < 0) {
numerator_ *= -1;
denominator_ *= -1;
}
int GPD = std::gcd(numerator_, denominator_);
numerator_ /= GPD;
denominator_ /= GPD;
}
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();
}

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