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From: rana@hpqtdla.sqf.hp.com (Rana Raychoudhury)
Newsgroups: comp.lang.c
Subject: Re: Time
Message-ID: <430014@hpqtdla.sqf.hp.com>
Date: 6 Feb 91 17:31:09 GMT
References: <8258@castle.ed.ac.uk>
Organization: HP, Queensferry Telecomms, Scotland
Lines: 51


> Is there a simple way of getting hold of the system time from within a
> C program?  I've read all the material I can find on time.h, but can't
> make head or tail of it, and have had to resort to passing in the time
> as a command line argument.  This may be a really idiotic question,
> -- 
>   James Gillespie,     /~~~~~~~~\
>  Edinurgh University. /   @  @   \    "I'm not musical either - 
>    james@ed.ac.uk    /     <      \               I play the bagpipes"
> ____________________/  \________/  \__________________________________________

(I assume you mean "time of day" and are using an ANSI compiler :-

 [From the 'C Programming Language, 2nd Edition pp256-7]

 .... 

 char *asctime(const struct tm *tp)
  
 converts the time in the structure *tp into a string of the form

 Sun Jan  3 15:14:13 1988\n

 char *ctime(const time_t *tp)

 converts the calendar time *tp to local time; equivalent to :-

 asctime(localtime(tp));

 blah blah blah.

 Here's a little example :-

---------------- snip snip --------------
#include <time.h>

time_t now;

main()
{
  (void) time( &now );
  printf("The time is : %s\n", asctime(localtime(&now)));
}
---------------- snip snip --------------

 which produces something like :-

The time is : Wed Feb  6 17:27:15 1991


-rana-