🚀 go-pugleaf

dejesus@archimedes.nwc.navy.mil (Francisco X DeJesus) writes:
>I realize that date/time-related questions are common here, so no flames
>if this has been asked before...
>
>If I can get today's date in a shell script or C program, how can I find
>out the dates of the next week? For example, if I know today is
>"Wed Dec 30 1992", how can I have the program now that the next seven days
>are going to be "Thu Dec 31 1992", "Fri Jan 1 1993", etc (taking the
>case in which both month and year could change).

In C something like:

	int
	main(argc, argv) 
	int argc;
	char **argv; {
		long now, time(), atol();

		now = time((long *)0);
		if (argc == 2) {
			now += atol(argv[1]) * 60L * 60L * 24L;
		}

		puts(ctime(&now));

		return  0;
	}

If you call this programme "foo", then "foo 3" will print out what
the time and date will be three days from now in the same format
as the date command.  The key thing here is that Unix time is
kept as the number of seconds since midnight Jan 1 1970 GMT, and
so it's easy to do arithmetic like adding a day.

							Ross Ridge

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