Based on the code below, implement a base class Appointment and derived classes

Question

Based on the code below, implement a base class Appointment and derived classes Onetime, Daily, Weekly, and Monthly. An appointment has a description (for example "see an advisor") and a date and a time. Write a virtual function occurs_on(int year, int month, int day) that checks whether the appointment occurs on that date. For example, for a monthly appointment, you must check whether a day of the month matches. Then fill a vector of Appointment* with a mixtures of appointments. Have user enter a date and printout all appointments that happens on that date.

Please Provide output with response. Thank you.

#include <iostream>
#include <string>
#include <ctime>
#include <vector>

using namespace std;

const int DAYS_PER_MONTH = 30;
/**
A class that describes a time of day
(between 00:00:00 and 23:59:59)
*/
class Time
{
public:
/**
Constructs a time of day.
@param hour the hours
@param min the minutes
@param sec the seconds
*/
Time(int hour, int min, int sec);
/**
Constructs a Time object that is set to
the time at which the constructor executes.
*/
Time();

/**
Gets the hours of this time.
@return the hours
*/
int get_hours() const;
/**
Gets the minutes of this time.
@return the minutes
*/
int get_minutes() const;
/**
Gets the seconds of this time.
@return the seconds
*/
int get_seconds() const;

/**
Computes the seconds between this time and another.
@param t the other time
@return the number of seconds between this time and t
*/
int seconds_from(Time t) const;
/**
Adds a number of seconds to this time.
@param s the number of seconds to add
*/
void add_seconds(int s);

private:
int time_in_secs;
};

/**
Computes the correct remainder for negative dividend
@param a - an integer
@param n - an integer > 0
@return the mathematically correct remainder r such that
a - r is divisible by n and 0 <= r and r < n
*/
int remainder(int a, int n)
{
if (a >= 0)
{
return a % n;
}
else
{
return n - 1 - (-a - 1) % n;
}
}

Time::Time(int hour, int min, int sec)
{
time_in_secs = 60L * 60 * hour + 60 * min + sec;
}

Time::Time()
{
time_in_secs = 0;
}

int Time::get_hours() const
{
return time_in_secs / (60 * 60);
}

int Time::get_minutes() const
{
return (time_in_secs / 60) % 60;
}

int Time::get_seconds() const
{
return time_in_secs % 60;
}

int Time::seconds_from(Time t) const
{
return time_in_secs - t.time_in_secs;
}

void Time::add_seconds(int s)
{
const int SECONDS_PER_DAY = 60 * 60 * 24;
time_in_secs = remainder(time_in_secs + s, SECONDS_PER_DAY);
}

//..................................................................

class Date
{
public:
Date();
Date(int y, int m, int d);
void print() const;
bool equals(Date other) const;
private:
int day;
int month;
int year;
};

Date::Date()
{
day = 1;
month = 1;
year = 1;
}

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

void Date::print() const
{
cout << year << "/" << month << "/" << day;
}

bool Date::equals(Date other) const
{
return day == other.day && month == other.month
&& year == other.year;
}

//..................................................................

int main()
{
vector<Appointment*> schedule(3);
schedule[0]= new Onetime("see the dentist", Date(1998, 9, 4),
Time(11, 30, 0), Time(12, 30, 0));
schedule[1]= new Daily("brush my teeth", Time(8,0,0),
Time(8, 5, 0));
schedule[2]= new Monthly("clean the house", 4,
Time(14,0,0), Time(16, 0, 0));

cout << "Enter year month day: ";
int year;
int month;
int day;
cin >> year >> month >> day;

cout << "You have these appointments: " << " ";
for (int i = 0; i < schedule.size(); i++)
{
if (schedule[i]->occurs_on(year, month, day))
{
schedule[i]->print();
}
}
return 0;
}

Explanation / Answer

// Modified your code: added ccc_time.h at the bottom.

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