internet.h

#pragma once
#include"taryf.h"
using namespace std;
class Internet :public Taryf {
protected:
    static double zainternet;
    double gb;
public:
    Internet() :Taryf(), gb(0) {}
    Internet(string n1, string m1, double c1, unsigned t) : Taryf(n1, m1, c1), gb(t) {}
    Internet(const Internet& i) : Taryf(i), gb(i.gb) {}

    double get_suma() const {
        return (cost + (gb * zainternet));
    }

    friend ostream& operator<<(ostream& out, const Internet& i) {
        out << (Taryf&)i << "Borg:" << i.gb << "Gb" << "\t" << "Do splaty:" << i.get_suma() << endl;
        return out;
    }
    friend istream& operator>>(istream& in, Internet& i) {
        in >> (Taryf&)i;
        in >> i.gb;
        return in;
    }
    void print() const {
        Taryf::print();
        cout << "Internet:" << gb << "Gb" << "\t" << "Do splaty:" << Internet::get_suma() << endl;
    }
};