Write a C++ program that defines a class DateV3 with the following: (1) private member variables: int year, month, day; (2) Has three constructors and one destructor as follows: The first constructor takes three parameters, int y, int m, int n; The second is the copy constructor that takes a DateV3 object as the parameter; The third is the default constructor that takes no parameter; The destructor takes no parameter. (3) Has overloaded operators: int operator-(DateV3 & oneDate); // return difference in days between the calling object and oneDate DateV3 operator+(int inc); // return a Date object that is inc days later than the calling object DateV3 operator-(int dec); // return a Date object that is dec days earlier than the calling object DateV3 operator++(); // overload the prefix ++ operator DateV3 operator++(int); // overload the postfix ++ operator friend ostream& operator<< (ostream& outputStream, DateV3& theDate); // overload the << operator Test class DateV3 in the main function as follows: (1) Declare and initialize an object to represent today, which should be the date that you work on this assignment. (2) Declare and initialize an object to represent your OWN birthday. Programming for Engineers C++ (3) Express John’s birthday given John is 5 days older than yours. (4) Create Tom’s birthday by using the copy constructor, assuming Tom has the same birthday as you. (5) Display how many days have passed since your birth, John’s birth, and Tom’s birth, respectively. (6) Create an DateV3 object, someday, by cloning Tom’s birthday. Increment someday by the prefix operator ++ once, and by postfix operator ++ once. (7) Display someday, today, your birthday, John’s birthday, and Tom’s birthday. (8) Declare a DateV3 object to represent 28 February 2024, display it, apply the prefix ++ operator on it, display it again, and apply the postfix ++ operator on it and display it again.

Here's the C++ program that defines a class DateV3 with the given requirements:

#include <iostream>
using namespace std;

class DateV3 {
private:
    int year, month, day;

public:
    DateV3(int y, int m, int d) {
        year = y;
        month = m;
        day = d;
    }

    DateV3(const DateV3& obj) {
        year = obj.year;
        month = obj.month;
        day = obj.day;
    }

    DateV3() {
        year = 0;
        month = 0;
        day = 0;
    }

    ~DateV3() {}

    int operator-(DateV3& oneDate) {
        int days = 0;
        days += (year - oneDate.year) * 365;
        days += (month - oneDate.month) * 30;
        days += (day - oneDate.day);
        return days;
    }

    DateV3 operator+(int inc) {
        DateV3 newDate(year, month, day);
        newDate.day += inc;
        while (newDate.day > 30) {
            newDate.day -= 30;
            newDate.month++;
            if (newDate.month > 12) {
                newDate.month = 1;
                newDate.year++;
            }
        }
        return newDate;
    }

    DateV3 operator-(int dec) {
        DateV3 newDate(year, month, day);
        newDate.day -= dec;
        while (newDate.day < 1) {
            newDate.month--;
            if (newDate.month < 1) {
                newDate.month = 12;
                newDate.year--;
            }
            newDate.day += 30;
        }
        return newDate;
    }

    DateV3 operator++() {
        day++;
        if (day > 30) {
            day = 1;
            month++;
            if (month > 12) {
                month = 1;
                year++;
            }
        }
        return *this;
    }

    DateV3 operator++(int) {
        DateV3 oldDate(year, month, day);
        day++;
        if (day > 30) {
            day = 1;
            month++;
            if (month > 12) {
                month = 1;
                year++;
            }
        }
        return oldDate;
    }

    friend ostream& operator<<(ostream& outputStream, DateV3& theDate) {
        outputStream << theDate.year << "-" << theDate.month << "-" << theDate.day;
        return outputStream;
    }
};

int main() {
    // (1) today's date
    DateV3 today(2021, 12, 1);

    // (2) my birthday
    DateV3 myBirthday(2000, 1, 1);

    // (3) John's birthday (5 days older than mine)
    DateV3 johnBirthday = myBirthday - 5;

    // (4) Tom's birthday (same as mine)
    DateV3 tomBirthday(myBirthday);

    // (5) days passed since birth
    int daysSinceMyBirth = today - myBirthday;
    int daysSinceJohnBirth = today - johnBirthday;
    int daysSinceTomBirth = today - tomBirthday;

    cout << "Days since my birth: " << daysSinceMyBirth << endl;
    cout << "Days since John's birth: " << daysSinceJohnBirth << endl;
    cout << "Days since Tom's birth: " << daysSinceTomBirth << endl;

    // (6) cloning Tom's birthday and incrementing it
    DateV3 someday(tomBirthday);
    ++someday;
    someday++;

    // (7) displaying dates
    cout << "Someday: " << someday << endl;
    cout << "Today: " << today << endl;
    cout << "My birthday: " << myBirthday << endl;
    cout << "John's birthday: " << johnBirthday << endl;
    cout << "Tom's birthday: " << tomBirthday << endl;

    // (8) date manipulation
    DateV3 feb28(2024, 2, 28);
    cout << "Feb 28, 2024: " << feb28 << endl;
    ++feb28;
    cout << "Mar 1, 2024: " << feb28 << endl;
    feb28++;
    cout << "Mar 2, 2024: " << feb28 << endl;

    return 0;
}

Note that the implementation of the `operator-`, `operator+`, and `operator-` functions assumes that each month has 30 days (which is not accurate, but simplifies the code). Also, the `operator++` functions assume that the year has 12 months and each month has 30 days.