[2015][Homework]Team05 - Hw03

main program

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace hw3
{
    class Program
    {
        static void Main(string[] args)
        {
            MyDateTime date = new MyDateTime();
            while (true)
            {
                Console.WriteLine("Input Year");
                date.year = int.Parse(Console.ReadLine());
                Console.WriteLine("Input Month");
                date.month = int.Parse(Console.ReadLine());
                Console.WriteLine("Input Day");
                date.day = int.Parse(Console.ReadLine());
                if (date.isLegal() == false)
                {
                    Console.WriteLine("{0},{1},{2} is not a legal date!", date.year, date.month, date.day);
                    Console.WriteLine("Input Again!");
                    Console.ReadLine();
                    Console.Clear();
                    continue;
                }
                Console.WriteLine("************************************************************");
                switch (date.isLeap())
                {
                    case true:
                        Console.WriteLine("Year {0} is a leap year!", date.year);
                        break;
                    case false:
                        Console.WriteLine("Year {0} is not a leap year!", date.year);
                        break;
                }
                Console.WriteLine("Days of year {0} = {1}", date.year, date.daysOfYear());
                Console.WriteLine("Days of {0}/{1} = {2}", date.year, date.month, date.daysOfMonth());
                Console.WriteLine("{0}/{1}/{2} is {3}", date.year, date.month, date.day, date.weekDay());
                Console.WriteLine("************************************************************");
                Console.WriteLine("Again? Y/N");
                char select = Convert.ToChar(Console.ReadLine());
                if (select != ('y') && select != ('Y'))
                    break;
                Console.Clear();
            }
            return;
        }
    }
}

MyDateTime

using System;

namespace hw3
{
    class MyDateTime
    {
        public int year;
        public int month;
        public int day;
        
        
        public bool isLeap()
        {
            if (year % 4 == 0 && year % 100 != 0)
                return true;
            else if (year % 400 == 0)
                return true;
            else
                return false;
        }
        public bool isLegal()
        {
            if (day > 31)
                return false;
            else if (day == 31 && month % 2 == 0)
            {
                if (month == 8 || month == 10 || month == 12)
                    return true;
                else
                    return false;
            }
            else if (day == 30 && month == 2)
                return false;
            else if (day == 29)
            {
                if (isLeap())
                    return true;
                else
                    return false;
            }
            else
                return true;
        }     
        public void print() 
        {
            Console.WriteLine("{0}/{1}/{2}", year,month, day);
        }
        public int daysOfYear()
        {
            if (isLeap())
                return 366;
            else
                return 365;
        }
        public int daysOfMonth()
        {
            if (month == 2)
                if (isLeap())
                    return 29;
                else
                    return 28;
            else if (month % 2 == 1 || month == 8)
                return 31;
            else
                return 30;
        }
        public string weekDay() 
        {
            if (month == 1 || month == 2 )
            {
                year = year - 1;
                month = month + 12;
            }
            switch ((day + 2 * month + 3 * (month + 1) / 5 + year + year / 4 - year / 100 + year / 400 + 1) % 7)
            {
                case (0):
                    return "Sunday";
                case (1):
                    return "Monday";
                case (2):
                    return "Tuesday";
                case (3):
                    return "Wednesday";
                case (4):
                    return "Thursday";
                case (5):
                    return "Friday";
                case (6):
                    return "Saturday";
                default:
                    return "";
            }
        }
    }
}