This is the currency class from lab 2 that mention in the instructions class Currency { protected:     int whole;     int fraction;     virtual std::string get_name() = 0; public:     Currency() {         whole = 0;         fraction = 0;     }     Currency(double value) {         if (value < 0)

This is the currency class from lab 2 that mention in the instructions

class Currency {
protected:
    int whole;
    int fraction;
    virtual std::string get_name() = 0;

public:
    Currency() {
        whole = 0;
        fraction = 0;
    }
    Currency(double value) {
        if (value < 0)
            throw "Invalid value";
        whole = int(value);
        fraction = std::round(100 * (value - whole));
    }
    Currency(const Currency& curr) {
        whole = curr.whole;
        fraction = curr.fraction;
    }
    int get_whole() { return whole; }

    int get_fraction() { return fraction; }

    void set_whole(int w) {
        if (w >= 0)
            whole = w;
    }

    void set_fraction(int f) {
        if (f >= 0 && f < 100)
            fraction = f;
    }

    void add(const Currency* curr) {
        whole += curr->whole;
        fraction += curr->fraction;
        if (fraction > 100) {
            whole++;
            fraction %= 100;
        }
    }

    void subtract(const Currency* curr) {
        if (!isGreater(*curr))
            throw "Invalid Subtraction";
        whole -= curr->whole;
        if (fraction < curr->fraction) {
            fraction = fraction + 100 - curr->fraction;
            whole--;
        }
        else {
            fraction -= curr->fraction;
        }
    }

    bool isEqual(const Currency& curr) {
        return curr.whole == whole && curr.fraction == fraction;
    }

    bool isGreater(const Currency& curr) {
        if (whole < curr.whole)
            return false;
        if (whole == curr.whole && fraction < curr.fraction)
            return false;
        return true;
    }

    void print() {
        std::cout << whole << "." << fraction << " " << get_name() << std::endl;
    }
};