#include<iostream>
#include<fstream>
#include<cmath>

#define M_PI 3.14159265358979323846

using namespace std;

class CalcObject {
protected:
    double calcPar;
public:
    virtual void set() = 0;
    virtual void get() = 0;
    virtual double calc() = 0;
    virtual void getResult() = 0;
};
class Rozbriz : public CalcObject {
private:
    double P, w, S_otv, m, R, g, del_S, H;
public:
    Rozbriz() { P = w = S_otv = m = R = g = del_S = H = 0; }
    Rozbriz(double _P, double _w, double _S_otv, double _m, double _R, double _g, double _del_S, double _H) :P(_P), w(_w), S_otv(_S_otv), m(_m), R(_R), g(_g), del_S(_del_S), H(_H) {}
    Rozbriz(const Rozbriz& x) {
        P = x.P;
        w = x.w;
        S_otv = x.S_otv;
        m = x.m;
        R = x.R;
        g = x.g;
        del_S = x.del_S;
        H = x.H;
    }
    void set() {
        cout << "Enter info: " << endl;
        cout << "P = ";     cin >> P;
        cout << "w = ";     cin >> w;
        cout << "S_otv = "; cin >> S_otv;
        cout << "m = ";     cin >> m;
        cout << "R = ";     cin >> R;
        cout << "g = ";     cin >> g;
        cout << "del_S = "; cin >> del_S;
        cout << "H = ";     cin >> H;
        cout << endl;
    }
    void get() {
        cout << "Info " << endl;
        cout << "P = " << P;
        cout << "w = " << w;
        cout << "S_otv = " << S_otv;
        cout << "m = " << m;
        cout << "R = " << R;
        cout << "g = " << g;
        cout << "del_S = " << del_S;
        cout << "H = " << H;
        cout << endl;
    }
    double calc() {
        calcPar = 2. / 3 * ((M_PI * P * pow(w, 2) * S_otv * m * pow(R, 3)) / (g * del_S)) * pow(pow(w, 2) * pow(R, 2) + 2 * g * H, 3. / 2);
        return calcPar;
    }
    void getResult() {
        cout << "Calculeted parameter: " << calcPar << endl;
    }
    Rozbriz& operator = (const Rozbriz& x) {
        P = x.P;
        w = x.w;
        S_otv = x.S_otv;
        m = x.m;
        R = x.R;
        g = x.g;
        del_S = x.del_S;
        H = x.H;
        return *this;
    }
    bool operator == (const Rozbriz& x) { return calcPar == x.calcPar; }
    bool operator != (const Rozbriz& x) { return calcPar != x.calcPar; }
    bool operator > (const Rozbriz& x) { return calcPar > x.calcPar; }
    bool operator >= (const Rozbriz& x) { return calcPar >= x.calcPar; }
    bool operator < (const Rozbriz& x) { return calcPar < x.calcPar; }
    bool operator <= (const Rozbriz& x) { return calcPar <= x.calcPar; }

    friend ifstream& operator >> (ifstream& ifs, Rozbriz& x);
    friend ofstream& operator << (ofstream& ofs, Rozbriz& x);
    friend istream& operator >> (istream& is, Rozbriz& x);
    friend ostream& operator << (ostream& os, Rozbriz& x);
};

ifstream& operator >> (ifstream& ifs, Rozbriz& x) {
    ifs >> x.P >> x.w >> x.S_otv >> x.m >> x.R >> x.g >> x.del_S >> x.H;
    return ifs;
}

ofstream& operator << (ofstream& ofs, Rozbriz& x) {
    ofs << " Info " << endl;
    ofs << " P = " << x.P;
    ofs << " w = " << x.w;
    ofs << " S_otv = " << x.S_otv;
    ofs << " m = " << x.m;
    ofs << " R = " << x.R;
    ofs << " g = " << x.g;
    ofs << " del_S = " << x.del_S;
    ofs << " H = " << x.H;
    ofs << endl;
    return ofs;
}

istream& operator >> (istream& is, Rozbriz& x) {

    cout << "Info " << endl;
    cout << " P = ";        is >> x.P;
    cout << " w = ";        is >> x.w;
    cout << " S_otv = ";    is >> x.S_otv;
    cout << " m = ";        is >> x.m;
    cout << " R = ";        is >> x.R;
    cout << " g = ";        is >> x.g;
    cout << " del_S = ";    is >> x.del_S;
    cout << " H = ";        is >> x.H;
    cout << endl;
    return is;
}

ostream& operator << (ostream& os, Rozbriz& x) {
    os << " Info " << endl;
    os << " P = " << x.P << endl;
    os << " w = " << x.w << endl;
    os << " S_otv = " << x.S_otv << endl;
    os << " m = " << x.m << endl;
    os << " R = " << x.R << endl;
    os << " g = " << x.g << endl;
    os << " del_S = " << x.del_S << endl;
    os << " H = " << x.H << endl;
    os << endl;
    return os;
}


int main() {
    cout << "###Constructor test###" << endl;
    Rozbriz x;
    cout << "Default constructor: " << endl << x;
    Rozbriz y(1000, 100, 0.000001, 0.65, 0.15, 9.81, 0.0001, 0.3);
    double yRes = y.calc();
    cout << "Init constructor: " << endl << y;
    Rozbriz z = y;
    cout << "Copy constructor: " << endl << z;
    cout << "###Functions test###" << endl << endl;
    cout << "Set function:" << endl;
    x.set();
    cout << "Get function:" << endl;
    x.get();
    x.calc();
    cout << "Result function:" << endl;
    x.getResult();
    cout << "###Operators test###" << endl << endl;
    cout << "x object:" << endl;
    x.get();
    cout << "y object:" << endl;
    y.get();
    cout << "Operator == between obj x & y" << endl;
    cout << "result = " << boolalpha << (x == y) << endl << endl;
    cout << "Operator != between obj x & y" << endl;
    cout << "result = " << boolalpha << (x != y) << endl << endl;

    cout << "Operator < between obj x & y" << endl;
    cout << "result = " << boolalpha << (x < y) << endl << endl;

    cout << "Operator <= between obj x & y" << endl;
    cout << "result = " << boolalpha << (x <= y) << endl << endl;
    cout << "Operator > between obj x & y" << endl;
    cout << "result = " << boolalpha << (x > y) << endl << endl;

    cout << "Operator >= between obj x & y" << endl;
    cout << "result = " << boolalpha << (x >= y) << endl << endl;

    cout << "Operator = between obj x & y" << endl;
    x = y;
    cout << "x object:" << endl;
    x.get();
    cout << "y object:" << endl;
    y.get();
    Rozbriz a;
    ifstream ifs("in.txt");
    ofstream ofs("out.txt");
    ifs >> a;
    double aRes = a.calc();
    cout << a<< aRes;
    ofs << a<< aRes;

    return 0;
}