cppFractionHWExample

#include <iostream>

class Fraction
{
    int numerator;
    int denominator;
    int gcd(int a, int b);
    void reduce();

public:

    Fraction() : Fraction(1, 1) {}
    Fraction(int gotNum, int gotDenom) : numerator{ gotNum }, denominator{ gotDenom } { reduce(); }

    void setNumerator(int num) { numerator = num; reduce(); };
    int getNumerator() const { return numerator; };
    void setDenominator(int denom) { denominator = denom ? denom : 1; reduce(); };
    int getDenominator() const { return denominator; };
    void set(int num, int denom) { numerator = num; denominator = denom ? denom : 1; reduce(); }
    void print() const;
    Fraction add(const Fraction& fract);
    Fraction sub(const Fraction& fract);
    Fraction mul(const Fraction& fract);
    Fraction div(const Fraction& fract);
    Fraction add(int Int);
    Fraction sub(int Int);
    Fraction mul(int Int);
    Fraction div(int Int);

};

int Fraction::gcd(int a, int b)
{
    while (b)
    {
        a %= b;
        std::swap(a, b);
    }
    return a;
}

void Fraction::reduce()
{
    int gcdVal{ gcd(numerator, denominator) };
    numerator /= gcdVal;
    denominator /= gcdVal;

    if (denominator < 0 and numerator < 0)
    {
        denominator *= -1;
        numerator *= -1;
    }
}

Fraction Fraction::add(const Fraction& fract)
{
    return Fraction{ numerator * fract.denominator + fract.numerator * denominator, denominator * fract.denominator };
}

Fraction Fraction::sub(const Fraction& fract)
{
    return Fraction{ numerator * fract.denominator - fract.numerator * denominator, denominator * fract.denominator };
}

Fraction Fraction::mul(const Fraction& fract)
{
    return Fraction{ numerator * fract.numerator, denominator * fract.denominator };

}

Fraction Fraction::div(const Fraction& fract)
{
    return Fraction{ numerator * fract.denominator, denominator * fract.numerator };
}

Fraction Fraction::add(int Int)
{
    return Fraction{ numerator + Int * denominator, denominator };
}

Fraction Fraction::sub(int Int)
{
    return Fraction{ numerator - Int * denominator, denominator };
}

Fraction Fraction::mul(int Int)
{
    return Fraction{ numerator * Int, denominator };
}

Fraction Fraction::div(int Int)
{
    return Fraction{ numerator, denominator * Int };
}

void Fraction::print() const
{
    std::cout << '(' << numerator << " / " << denominator << ")";
}

int main()
{
    Fraction a{ 1,2 };
    Fraction b{ 1,3 };
    int c{ 7 };

    std::cout << "a = "; a.print(); std::cout << " b = "; b.print(); std::cout << " c = " << c; std::cout << '\n';
    std::cout << "a + b = "; a.add(b).print(); std::cout << '\n';
    std::cout << "a - b = "; a.sub(b).print(); std::cout << '\n';
    std::cout << "a * b = "; a.mul(b).print(); std::cout << '\n';
    std::cout << "a / b = "; a.div(b).print(); std::cout << '\n';
    std::cout << "a + c = "; a.add(c).print(); std::cout << '\n';
    std::cout << "a - c = "; a.sub(c).print(); std::cout << '\n';
    std::cout << "a * c = "; a.mul(c).print(); std::cout << '\n';
    std::cout << "a / c = "; a.div(c).print(); std::cout << '\n';

    return 0;
}