laba4.cpp

#include "stdafx.h"
#include <iostream>
#include <math.h>
#include <string>
#include <time.h>

using namespace std;

class MyTime {

    private:

        int hours;
        int minutes;

    public:

        MyTime()
        {
            hours = 12;
            minutes = 0;
        }

        MyTime(int H, int M)
        {
            Set(H, M);
        }

        MyTime(int M)
        {
            hours = M / 60 % 24;
            minutes = M % 60;
            FixTime();
        }

        void Set(int H, int M)
        {
            hours = H;
            minutes = M;
            FixTime();
        }

        void FixTime()
        {
            minutes < 60 ? minutes = abs(minutes) : (hours += abs(minutes) / 60) && (minutes = abs(minutes) % 60);
            hours = abs(hours % 24);
        }

        virtual void Show()
        {
            cout << hours << " часов и " << minutes << " минут. \n";
        }


        MyTime Sum(MyTime t2)
        {
            MyTime t;
            t.Set(hours + t2.hours, minutes + t2.minutes);
            return t;
        }


        friend ostream& operator << (ostream & os, const MyTime &);

        virtual MyTime operator + (const MyTime & t2)
        {
            return MyTime(hours + t2.hours, minutes + t2.minutes);
        }

        MyTime operator ++ (int)
        {
            MyTime t = MyTime(this->hours, this->minutes++);
            FixTime();
            return t;
        }


        virtual ~MyTime()
        {
            cout << "Удаляется объект базового класса. \n";
        };
};


class CityTime : public MyTime
{
    private:
        string city;
    public:
        CityTime(int H, int M, string City) : MyTime(H, M), city (City) {}

    void Set(int H, int M, int City)
    {
        MyTime::Set(H, M);
        city = City;
        FixCityName(city);
    }

    void Show()
    {
        FixCityName(city);
        cout << "В городе " << city << " ";
        MyTime::Show();
    }

    string FixCityName (string &City)
    {
        City[0] = toupper(City[0]);
        return City;
    }

    CityTime operator + (const CityTime & t2)
    {
        return CityTime(hours + t2.hours, minutes + t2.minutes);
    }

    ~CityTime()
    {
        cout << "Удаляется объект класса-наследника. \n";
    };
};

ostream & operator << (ostream & os, const MyTime & t) // why & ?
{
    os << "\nIt's " << t.hours << " hours and " << t.minutes << " minutes." << endl;
    return os;
}

int main()
{
    setlocale(LC_ALL, "rus");
    srand(time(NULL));

    CityTime MoscowTime = CityTime(18, 22, "москва");
    MoscowTime.Show();

    string cityArr[] = { "москва", "Лондон", "шанхай", "Вашингтон", "Дублин" };
    MyTime** timeArr = new MyTime* [10];
    for (int i = 0; i < 10; i++)
    {
        if (i % 2 == 0)
        {
            timeArr[i] = new MyTime(rand(), rand());
            timeArr[i]->Show();
        }
        else
        {
            timeArr[i] = new CityTime(rand(), rand(), cityArr[i / 2]);
            timeArr[i]->Show();
        }
    }

    for (int i = 0; i < 10; i++) {
        delete timeArr[i];
    }

    return 0;
}