#include <iostream>
#include <windows.h>
using namespace std;
void color(int);

void gotoxy(int x, int y)
{
    COORD coord;
    coord.X = x;
    coord.Y = y;
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}

int main() {

    int year, days;
    int month = 1;
    char reply = 'Y';

    while (reply == 'Y') {
        cout << "Enter the number of the month [1-12]:          ";
        cin >> month;
        cout << "Enter the first day of the month number [1-7]: ";
        cin >> days;
        cout << "Enter the year:                                ";
        cin >> year;

        int weekday = days;


        switch (month)
        {
        case 1:
            if (days == 1) {
                HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
                SetConsoleTextAttribute(h, 4);
            }
            else if (days >= 2) {
                HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
                SetConsoleTextAttribute(h, 15);
            }
            days = 31;
            gotoxy(14, 4);
            cout << "January " << year;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;


        case 2:
            if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) { days = 29; }
            else { days = 28; }
            gotoxy(15, 4);
            cout << "Febuary " << year;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;
        case 3:
            days = 31;
            gotoxy(16, 4);
            cout << "March " << year;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;
        case 4:
            days = 30;
            gotoxy(16, 4);
            cout << "April " << year;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 5:
            days = 31;
            gotoxy(18, 4);
            cout << "May " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 6:
            days = 30;
            gotoxy(17, 4);
            cout << "June " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 7:
            days = 31;
            gotoxy(17, 4);
            cout << "July " << year << endl;
            gotoxy(0, 4);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 8:
            days = 31;
            gotoxy(15, 4);
            cout << "August " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 9:
            days = 3;
            gotoxy(12, 4);
            cout << "September " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 10:
            days = 31;
            gotoxy(14, 4);
            cout << "October " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 11:
            days = 30;
            gotoxy(13, 4);
            cout << "November " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;

        case 12:
            days = 31;
            gotoxy(13, 4);
            cout << "December " << year << endl;
            gotoxy(0, 5);
            cout << "=============================================" << endl;
            gotoxy(0, 6);
            cout << "SUN    MON    TUE   WED    THU    FRI    SAT" << endl;
            break;
        }

        int dayOfWeek;
        int x = (weekday - 1);


        for (int i = 1; i <= days; x  , i  )
        {
            dayOfWeek = x % 7;
            gotoxy(dayOfWeek * 7, 7   x / 7);
            cout << i << endl;
        }

        gotoxy(0, 12);
        cout << "=============================================" << endl;

        cout << "View next calendar [Y/N]                    ";
        cin >> reply;
        reply = toupper(reply);
        if (reply == 'Y') {
            system("CLS");
        }
    }

    return 0;
}