Data.cpp

#include "stdafx.h"
#include <iostream>
#include "Data.h"

using namespace std;

Data::Data()
{
	day = 1;
	month = 1;
	year = 0;
}

Data::Data(int d = 1, int m = 1, int y = 0)
{
	day = d;
	month = m;
	year = y;
}
int Data::get_day() {
	return day;
}
int Data::get_month() {
	return month;
}
int Data::get_year() {
	return year;
}
void Data::set_day(int n) {
	day = n;
}
void Data::set_month(int n) {
	month = n;
}
void Data::set_year(int n) {
	year = n;
}
void Data::print() {
	if (month < 10)
		cout << day << ".0" << month << "." << year << endl;
	else cout << day << "." << month << "." << year << endl;
}
Data Data::Next(Data a) {
	int i;
	int mes[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	if (a.year % 4 == 0 && a.year % 100 != 0 || a.year % 400 == 0)
		mes[1]++;
	for (i = 0; i < 12; i++)
		if (i + 1 == a.month && a.day == mes[i]){
			a.day = 1;
			a.month++;
			break;
		}
	if (i == 12)
		a.day++;
	if (a.month == 13){
		a.month = 1;
		a.year++;
	}
	return a;
}
Data Data::Prew(Data a) {
	int i;
	int mes[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	if (a.year % 4 == 0 && a.year % 100 != 0 || a.year % 400 == 0)
		mes[1]++;
	if (a.day > 1){
		a.day--; return a;
	}
	if (a.month == 1) {
			a.day = 31;
			a.month = 12;
			a.year--;
			return a;
	}
	for (i = 1; i < 12; i++) {
		if (a.month == i + 1) {
			a.day = mes[i - 1];
			a.month = i;
			return a;
		}
	}
}
int beg_year(Data a) {
	int n = 0;
	int i;
	int mes[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	if (a.year % 4 == 0 && a.year % 100 != 0 || a.year % 400 == 0)
		mes[1]++;
	for (i = 0; i < a.month-1; i++) {
		n += mes[i];
	}
	return (n + a.day);
}
Data Data::data_beg_year(int n, int p) {
	Data a(1, 1, 0);
	int d, count = 0;
	int mes[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	if (p % 4 == 0 && p % 100 != 0 || p % 400 == 0)
		mes[1]++;
	for (int i = 0; i < 12; i++) {
		if (n >= mes[i]) {
			n -= mes[i];
			count++;
		}
		else d = n;
	}
	a.set_day(d + 1);
	a.set_month(count + 1);
	a.set_year(p);
	return a;
}
void day_otw(Data a) {
	int dotw = 0;
	int code_m;
	int code_y;
	switch (a.month) {
	case 1:code_m = 6; break;
	case 2:code_m = 2; break;
	case 3:code_m = 2; break;
	case 4:code_m = 5; break;
	case 5:code_m = 0; break;
	case 6:code_m = 3; break;
	case 7:code_m = 5; break;
	case 8:code_m = 1; break;
	case 9:code_m = 4; break;
	case 10:code_m = 6; break;
	case 11:code_m = 2; break;
	case 12:code_m = 4;
	}
	//code_y = (6 + (a.year % 100) + (a.year % 100) / 4) % 7;
	code_y = (a.year % 100) / 12 + (a.year % 100) % 12 + ((a.year % 100) % 12) / 4;
	if ((a.year % 4 == 0 && a.year % 100 != 0 || a.year % 400 == 0) && (a.month == 1 || a.month==2))
		dotw = (a.day + code_m + code_y) % 7 - 1;
	else
		dotw = (a.day + code_m + code_y) % 7;
	switch (dotw) {

	case 1: cout << "Понедельник"; break;
	case 2: cout << "Вторник"; break;
	case 3: cout << "Среда"; break;
	case 4: cout << "Четверг"; break;
	case 5: cout << "Пятница"; break;
	case 6: cout << "Суббота"; break;
	case 7: cout << "Воскресенье";
	}
}