Class Task 6#

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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            int day, month, year;
            Console.WriteLine("Please enter a date:");
            Console.Write("Day: ");
            day = int.Parse(Console.ReadLine());
            while (day < 1 || day > 31)
            {
                Console.Write("Re-enter the day so it will be vaild (1 - 31)");
                day = int.Parse(Console.ReadLine());

            }
            Console.Write("Month: ");
            month = int.Parse(Console.ReadLine());
            while (month < 1 || month > 12)
            {
                Console.Write("Re-enter the month so it will be vaid (1 - 12): ");
                month = int.Parse(Console.ReadLine());
            }
            Console.Write("Year: ");
            year = int.Parse(Console.ReadLine());
            while (year < 1900 || year > 2013)
            {
                Console.Write("Re-enter the year so it will be vaild (1900 - 2013): ");
                year = int.Parse(Console.ReadLine());
            }
            switch (month)
            {
                case 4:
                case 6:
                case 9:
                case 11: if (day > 30)
                        Console.WriteLine("The day is not vaild for this month! We can not check what is the next day!"); break;
                case 2: if (day > 28)
                        Console.WriteLine("The day is not vaild for this month! We can not check what is the next day!"); break;
                default: Console.WriteLine("The date is fine!"); break;
            }
            Console.WriteLine("The date you've typed is: " + day + "/" + month + "/" + year);
            switch (day)
            {
                case 29:
                    switch (month)
                    {
                        case 2:
                            day = 1;
                            month++;
                            Console.WriteLine("The next day is " + day + "/" + "/" + month + "/" + year);
                        break;
                    }
                    break;
                case 30:
                    switch (month)
                    {
                        case 4:
                        case 6:
                        case 9:
                        case 11:
                            day = 1;
                            month++;
                            Console.WriteLine("The next day is " + day + "/" + "/" + month + "/" + year);
                        break;
                    }
                    break;
                case 31:
                    switch (month)
                    {
                        case 1:
                        case 3:
                        case 5:
                        case 7:
                        case 8:
                        case 10:
                            day = 1;
                            month++;
                            Console.WriteLine("The next day is " + day + "/" + "/" + month + "/" + year);
                            break;
                        case 12:
                            day = 1;
                            month = 1;
                            year++;
                            Console.WriteLine("The next day is " + day + "/" + "/" + month + "/" + year);
                            break;

                    }
                    break;
                default:
                    day++;
                    Console.WriteLine("The next day is " + day + "/" + "/" + month + "/" + year);
                    break;
            }
            Console.ReadKey();
        }
    }
}