Untitled

#include <iostream>
#include <stdlib.h>
using namespace std;

class Fraction {
private:
	int first, second;
	int nod(int a, int b) {
		while (a && b) {
			if (a > b) {
				a = a % b;
			}
			else {
				b = b % a;
			}
		}
		return max(a, b);
	}
	int common_denominator = nod(first, second);
	int reduce(int n, int common_denominator) {
		n /= common_denominator;
		return n;
	}
public:
	Fraction() {
		cout << "Числитель и знаменатель не определены." << endl;
	}
	Fraction(int first, int second) : first(first), second(second) 
	{}
	void show_fraction() {
		first = reduce(first, common_denominator);
		second = reduce(second, common_denominator);
		cout << "Обыкновенная дробь: " << first << "/" << second << endl;
		cout << "Десятичная дробь: " << (float) first / second << endl;
	}
};

int main() {
	setlocale(0, "");
	Fraction my_fraction(3, 9);
	my_fraction.show_fraction();
}