taryf.h

#pragma once
#include<iostream>
#include<string>
using namespace std;

class Taryf {
protected:
    string nomer;
    string month;
    double cost;
public:
    Taryf():nomer(), month(), cost(0){}
    Taryf(string n, string m,double c): nomer(n),month(m),cost(c){}
    Taryf(const Taryf&t): nomer(t.nomer),month(t.month),cost(t.cost){}

    string get_nomer() const {
        return nomer;
    }
    virtual double get_suma()const {
        return cost;
    }
    friend ostream& operator<<(ostream& out, const Taryf& t) {
        out << "Number:" << t.nomer << "\t" << "Month:" << t.month << "\t" << "Cost:" << t.cost << "$" << endl;
        return out;
    }
    friend istream& operator>>(istream& in, Taryf& t) {
        in >> t.nomer;
        in >> t.month;
        in >> t.cost;
        return in;
    }
    void print() const {
        cout<< "Number:" << nomer << "\t" << "Month:" << month << "\t" << "Cost:" << cost << "$" << endl;
    }
};