C#:
두 날짜 비교하기

using System;

class Program
{
    static void Main()
    {
        DateTime date1 = new DateTime(2023, 1, 1);
        DateTime date2 = DateTime.Now;

        int comparison = DateTime.Compare(date1, date2);

        if (comparison < 0)
            Console.WriteLine($"{date1:d} is earlier than {date2:d}");
        else if (comparison == 0)
            Console.WriteLine($"{date1:d} is the same as {date2:d}");
        else
            Console.WriteLine($"{date1:d} is later than {date2:d}");
    }
}