Current Time

[davalend]

how to write the code to display the current time ?

[shanenin]

what programming language do you want to use? in python, this would display your time

import time
time.ctime().split()[3]

[jcl]

More or less ISO 8601.

ISO C

#include <time.h>
#include <stdio.h>

void print_time(void)
{
	struct tm * tm;
	time_t  t;
	char	s[100];

	t = time(NULL);
	tm = localtime(&t);
	strftime(s, sizeof s, "%Y-%m-%dT%H:%M:%S%z", tm);
	puts(s);
}

Win32

#include <stdio.h>
#include <windows.h>

void print_time(void)
{
	SYSTEMTIME st;
	TIME_ZONE_INFORMATION tz;

	GetLocalTime(&st);
	GetTimeZoneInformation(&tz);

	printf("%.4hu-%.2hu-%.2huT%.2hu:%.2hu:%.2hu%+.2ld:%.2ld\n",
		   st.wYear, st.wMonth, st.wDay,
		   st.wHour, st.wMinute, st.wSecond,
		   tz.Bias / 60, +tz.Bias % 60);
}

Java

import java.util.*;
import java.text.*;

public class T
{
	public static void printTime()
	{
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ");
		StringBuffer sb = new StringBuffer();

		df.format(new Date(), sb, new FieldPosition(0));
		System.out.println(sb.toString());
	}
}

C#

using System;

public class T
{
	public static void PrintTime()
	{
		Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd'T'HH:mm:sszzzz"));
	}
}

SML

fun printTime () =
	let
	  val d = Date.fromTimeLocal (Time.now ())
	  val f = Date.fmt "%Y-%m-%dT%H:%M:%S\n" d
	in
	  print f
	end

Common Lisp

(defun print-time ()
  (multiple-value-bind (second minute hour day month year weekday ds tz)
					   (get-decoded-time)
	(format t "~4,'0d-~2,'0d-~2,'0dT~2,'0d:~2,'0d:~2,'0d~2,'0@d" 
			year month day hour minute second tz)))

Edited January 28, 2006 by jcl

[shanenin]

my first code did not actually print the time, this does

import time
print time.ctime()

python sure seems simplest.

Edited January 28, 2006 by shanenin

[Hai-Etlik]

Ruby

puts Time.new

[jcl]

cmd.exe

> date /t

(*sh are shorter of course but AFAIK none of them have date as a built-in command.)

Edited January 29, 2006 by jcl