using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace program2

{

    public class Program

    {

        public static void Main(string[] args)

        {

            Console.WriteLine("Enter your date of birth in mm/dd/yyyy  format");

            DateTime dob = DateTime.Parse(Console.ReadLine());

            DateTime today = DateTime.Today;

            int y1 = dob.Year;

            int y2 = today.Year;

            int m1 = dob.Month;

            int m2 = today.Month;

            int age_year = y2 - y1;

            int age_month = m2 - m1;

​

            if (age_year<0 || age_year>100)

            {

                Console.WriteLine("The age is impossible");

            }

            else

            {

                if(age_month==0 && dob!=today)

                {

                    age_year--;

                    age_month= 12;

                }

                if(age_month<0)

                {

                    age_year--;

                    age_month= 12+age_month;

                }

                Console.WriteLine("Your age is {0} years, {1} months ", age_year, age_month);

                if(dob.Month==today.Month && dob.Day== today.Day)

                {

                    Console.WriteLine("HAPPY BIRTHDAY");

                }

​

            }

            Console.ReadLine();

​

        }

    }

}

​