#include <iostream>
#include <iomanip>
#include <sstream>

using namespace std;

class Date
{
public:
    Date(int mm=0, int dd=0, int yy=0)
    {
        year = yy;
        month = mm;
        day = dd;
    }

    //another way to construct the object! "12/31/2019"
    Date(string dateString)
    {
        char temp;
        istringstream(dateString) >> month >> temp >> day >> temp >> year;
    }

    //alternatively, << operator can be implemented!
    void display()
    {
        cout << month << '/' << day << '/' << year;
    }

    //function to return true if year is leap year, false otherwise.
    bool isLeapYear()
    {
        if (year % 4)
            return false;

        // year is divisible by 4
        if (year % 400 == 0)
            return true;

        // year is not divisible by 400
        if (year % 100 == 0)
            return false;

        // year is divisible by 4, but not divisible by 100
        return true;
    }

    //increment the day, if needed, increment the month,
    //if needed, increment the year
    void increment()
    {
        //static makes this array to be allocated like a global variable
        //but it is used only within this function
        static int daysInMonths[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

        if ((month == 2) && isLeapYear())
            daysInMonths[2] = 29;
        else
            daysInMonths[2] = 28;

        //increment the day, then make necessary adjustments
        day++;
        if (day > daysInMonths[month]) {
            day = 1;
            month++;
            if (month > 12) {
                month = 1;
                year++;
            }
        }
    }


private:
    int day, month, year;
};

//class to store time and display and do increment() operation
class Time
{
public:
    Time(int hh=0, int mm=0, int ss=0)
    {
        hour = hh;
        minute = mm;
        second = ss;
    }

    Time(string timeString)
    {
        char temp;
        istringstream(timeString) >> hour >> temp >> minute >> temp >> second;
    }

    //second: 59 --> 60: increment minute
    //minute: 59 --> 60: increment hour
    //hour: 23-->24: hour=0
    //return true if the day rolls over, return false in all other circumstances.
    bool increment()
    {
       second++;
       if (second == 60) {
            second = 0;
            minute++;
            if (minute == 60) {
                minute = 0;
                hour++;
                if (hour == 24) {
                    hour = 0;
                    return true;
                }
            }
       }
       return false;
    }


    void display()
    {
        cout << setfill('0');
        if (hour == 0)
            cout << 12 << ':' << setw(2) << minute << ':' << setw(2) << second << " AM";
        else if (hour < 12)
            cout << setw(2) << hour << ':' << setw(2) << minute << ':' << setw(2) << second << " AM";
        else if (hour == 12)
            cout << setw(2) << hour << ':' << setw(2) << minute << ':' << setw(2) << second << " PM";
        else
            cout << setw(2) << hour-12 << ':' << setw(2) << minute << ':' << setw(2) << second << " PM";
    }

private:
    int hour, minute, second;
};

//composition - we used 2 objects: Date & Time objects
class DateTime
{
public:
    //pass the necessary parameters to each constructor
    //to populate member objects
    DateTime(int mm=0, int dd=0, int yy=0, int hh=0, int mmm=0, int ss=0)
    {
        date = Date(mm, dd, yy);
        time = Time(hh, mmm, ss);
    }

    //another way to build DateTime object
    DateTime(Date dt, Time tt) {
        date = dt;
        time = tt;
    }

    //another way to build DateTime object
    DateTime(string dateStr, string timeStr) {
        date = Date(dateStr);
        time = Time(timeStr);
    }

    //another way to build DateTime object "1/1/2010 23:55:15"
    DateTime(string combinedStr) {
        string s1, s2;
        istringstream(combinedStr) >> s1 >> s2;
        DateTime(s1, s2);
    }

    //increment by one second
    void increment()
    {
        // if day rolled over, time.increment() returns true -> increment the date
        if (time.increment())
            date.increment();
    }

    void display()
    {
        date.display();
        cout << " ";
        time.display();
    }

private:
    Date date;
    Time time;
};

/* Sample inputs:
D 1/1/2010 40
T 23:55:15 1000
DT 1/1/2010 23:55:15 1000
*/


int main()
{
Date date("1/1/1990");

Time time("12:15:15");

DateTime *dtp = new DateTime(date, time);

}