Trying to finish code to compare age to 18 and give solution

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I'm currently trying to make a simple program that will ask a user in a console window to give me his year of birth. I will then subtract it from the current year and compare it to 18. I made an int for date.time.year - userdateofbirth and am trying to compare that to 18 to give an if then statement . If over 18 they will be able to continue, if not then they get rejected. My code so far is

C#

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)
        {
            string Thanks;
            Console.WriteLine("Thank you for choosing to shop with us");
            Console.ReadLine();

            string Birth;
            int Birthint;
            Console.WriteLine("To complete your purchase, please enter your date of birth.");
            Birth = Console.ReadLine();
            Birthint = Convert.ToInt32(Birth);
            Console.ReadLine();

            Console.WriteLine("This year is " + DateTime.Now.Year);
            Console.WriteLine("You are " + (DateTime.Now.Year - Birthint) + " years old.");
            Console.ReadLine();

            int Oldint = (DateTime.Now.Year - Birthint);
            Oldint = Convert.ToInt32(Oldint);






            if (Oldint >= 18)


                //you are over 18

            if (Oldint <= 18)

                //you are under 18



                Console.ReadLine();













        }
    }
}

any suggestions on where to go from here?

Posted 7-May-15 10:55am

Stephen Mogle

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Comments

Tomas Takac 7-May-15 17:21pm

What's your question?

Wombaticus 7-May-15 17:49pm

Next step si to take account of the current month and day, to see whether or not they have turned 18 if the current year - their date of birth = 18

ChrisCreateBoss 7-May-15 18:04pm

If the given age is under 18, you can show a Message Box saying that you must be older than 18 years to make the purchase. But if the age is above 18 you can show a message box or just use the console to say "Your purchase has been completed! Thank you!"

Florian Braun 8-May-15 1:50am

But I would strongly suggest to change the second if to just else {// do something}

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Maciej Los · Answer 1 · 2015-05-07T20:05:00

To calculate age, use something similar to:

C#

DateTime date1 = new DateTime(2001,1,15);
DateTime date2 = DateTime.Today;

int age = date2.Year - date1.Year;

Console.WriteLine("You are {0} 18 years old", age<18 ? "under" : "over");

More about time difference calculating: TimeSpan Structure[^]