Урок 3

kutuzzzov

Sep 26th, 2022 (edited)

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#include <numeric>
#include <ostream>
#include <vector>
#include <iostream>
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;
};
ostream& operator<<(ostream& out, Rational value) {
out << value.Numerator() << "/"s << value.Denominator();
return out;
}
istream& operator>>(istream& in, Rational& value) {
int numerator, denominator;
char drob;
in >> numerator >> drob >> denominator;
value = Rational{ numerator, denominator };
return in;
}
Rational operator+(Rational left, Rational right) {
const int numerator = left.Numerator() * right.Denominator()
+ right.Numerator() * left.Denominator();
const int denominator = left.Denominator() * right.Denominator();
return { numerator, denominator };
}
Rational operator-(Rational left, Rational right) {
const int numerator = left.Numerator() * right.Denominator()
- right.Numerator() * left.Denominator();
const int denominator = left.Denominator() * right.Denominator();
return { numerator, denominator };
}
Rational operator-(Rational value) {
return { -value.Numerator(), value.Denominator()};
}
Rational operator+(Rational value) {
return value;
}

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