Question

CO 3) Demonstrate encapsulation by creating a declaration file from the following UML diagram:

(Note) The declaration file is the header file (.h file) and implementation file is the .cpp file.

Date 0 - num Date: static int - day: int - month: int - year int +Date0 +Date(int, int, int) +Date(Date &) +Date0 +get Day0: int +setDay (nt): void +getMonth int +setMonth (int): void +getYear int +setYear(int) void +dis play Date0: void

Answer 1

$\color{blue}\underline{Data.h:}$

#ifndef DATE_H
#define DATE_H

class Date {
private:
    static int numDate;
    int day;
    int month;
    int year;
public:
    Date();
    Date(int day, int month, int year);
    Date(Date &d);
    ~Date();

    int getDay();
    void setDay(int day);
    int getMonth();
    void setMonth(int month);
    int getYear();
    void setYear(int year);
    void displayDate();
};

#endif

$\color{blue}\underline{Data.cpp:}$

#include "Date.h"
#include <iostream>

using namespace std;

Date::Date() {
    numDate++;
}

Date::Date(int day, int month, int year) : day(day), month(month), year(year) {
    numDate++;
}

Date::Date(Date &d) : day(d.day), month(d.month), year(d.year) {
    numDate++;
}

Date::~Date() {
    numDate--;
}

int Date::getDay() {
    return day;
}

void Date::setDay(int day) {
    this->day = day;
}

int Date::getMonth() {
    return month;
}

void Date::setMonth(int month) {
    this->month = month;
}

int Date::getYear() {
    return year;
}

void Date::setYear(int year) {
    this->year = year;
}

void Date::displayDate() {
    cout << day << "/" << month << "/" << year << endl;
}

int Date::numDate = 0;

$\color{blue}\underline{main.cpp:}$

#include <iostream>
#include "Date.h"
using namespace std;

int main() {
    Date date(3, 7, 2019);
    date.displayDate();
    return 0;
}