ДействияСДробями

#include <iostream>
#include <string>
#include <vector>
using namespace std;

class Fraction {
public:
    int num, denom; //numerator, denominator

    Fraction(int n, int d) {
        num = n;
        denom = d;
    }

    void simp() { // simplifier
        int a = num, b = denom;
        while (b != 0) {
            int c = a % b;
            a = b;
            b = c;
        }
        num = num / a;
        denom = denom / a;
    }

    void print() {
        cout << num << " / " << denom << endl;
    }
};

void add(Fraction f1, Fraction f2) { // addition
    int nod = 0;
    Fraction f3(0, 0);

    f3.num = f1.num*f2.denom + f1.denom*f2.num;
    f3.denom = f1.denom * f2.denom;

    f3.simp();

    f3.print();
}

void subtr(Fraction f1, Fraction f2) { // subtraction
    int nod = 0;
    Fraction f3(0, 0);

    f3.num = f1.num*f2.denom - f1.denom*f2.num;
    f3.denom = f1.denom * f2.denom;

    f3.simp();

    f3.print();
}

void mult(Fraction f1, Fraction f2) { // multiplication
    Fraction f3(0, 0);

    f3.num = f1.num*f2.num;
    f3.denom = f1.denom*f2.denom;

    f3.simp();

    f3.print();
}

void div(Fraction f1, Fraction f2) { // dividing
    if (f1.denom == 0 || f2.denom == 0) cout << "Impossible" << endl;
    else {
        Fraction f3(0, 0);

        f3.num = f1.num * f2.denom;
        f3.denom = f1.denom * f2.num;

        f3.simp();

        f3.print();
    }
}

int main()
{
    Fraction f1(4, 7), f2(1, 6);

    add(f1, f2);
    subtr(f1, f2);
    mult(f1, f2);
    div(f1, f2);

    system("pause");
    return 0;
}