demonstrates using a structure to return a group of variables from a function

   

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

//  tm.cs - demonstrates using a structure to return a group of variables
//          from a function
//
//          Compile this program using the following command line:
//              D:>csc tm.cs
//
namespace nsStructure
{
    using System;
    using System.Globalization;
    public struct tm
    {
        public int tm_sec;       // Seconds after the minute
        public int tm_min;       // Minutes after the hour 
        public int tm_hour;      // Hours since midnight
        public int tm_mday;      // The day of the month
        public int tm_mon;       // The month (January = 0)
        public int tm_year;      // The year (00 = 1900)
        public int tm_wday;      // The day of the week (Sunday = 0)
        public int tm_yday;      // The day of the year (Jan. 1 = 1)
        public int tm_isdst;     // Flag to indicate if DST is in effect
    }
    public class tmDemo
    {
        static public void Main()
        {
            DateTime timeVal = DateTime.Now;
            tm tmNow = LocalTime (timeVal);
            string strTime = AscTime (tmNow);
            Console.WriteLine (strTime);
        }
        static public tm LocalTime(DateTime tmVal)
        {
            tm time;
            time.tm_sec = tmVal.Second;
            time.tm_min = tmVal.Minute;
            time.tm_hour = tmVal.Hour;
            time.tm_mday = tmVal.Day;
            time.tm_mon = tmVal.Month - 1;
            time.tm_year = tmVal.Year - 1900;
            time.tm_wday = (int) tmVal.DayOfWeek;
            time.tm_yday = tmVal.DayOfYear;
            TimeZone tz = TimeZone.CurrentTimeZone;
            time.tm_isdst = tz.IsDaylightSavingTime (tmVal) == true ? 1 : 0;
            return (time);
        }
//
//  Returns a string representing a time using UNIX format
        static public string AscTime (tm time)
        {
            const string wDays = "SunMonTueWedThuFriSat";
            const string months = "JanFebMarAprMayJunJulAugSepOctNovDec";
            string strTime = String.Format ("{0} {1} {2,2:00} " + 
                            "{3,2:00}:{4,2:00}:{5,2:00} {6}
", 
                             wDays.Substring (3 * time.tm_wday, 3),
                             months.Substring (3 * time.tm_mon, 3),
                             time.tm_mday, time.tm_hour,
                             time.tm_min, time.tm_sec, time.tm_year + 1900);
            return (strTime);
        }
    }
}