Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | Ben Bacarisse <ben.usenet@bsb.me.uk> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: primitive instruction for programming |
| Date | 2015-04-20 02:06 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <87egnf7gm7.fsf@bsb.me.uk> (permalink) |
| References | (6 earlier) <263NCi.tYn.6s7aE@gmail.com> <7fde0524-8c3d-4ff5-95a7-b0a781881191@googlegroups.com> <mgs2pv$oh6$1@dont-email.me> <89faced1-f094-4c9d-bd57-fc3668996085@googlegroups.com> <mh1d4s$s4t$1@dont-email.me> |
Richard Heathfield <rjh@cpax.org.uk> writes:
> On 19/04/15 22:59, Michael Angelo Ravera wrote:
>> On Friday, April 17, 2015 at 3:52:50 PM UTC-7, Stephen Sprunk wrote:
>
> <snip>
>
>>> Most estimates put the number of humans at 100 to 115 billion.
> <snip>
>
>> [...] any estimate of human population before about 1880 should
>> be regarded with quite a bit of skepticism.
>
> Fortunately, the situation isn't as bad as all that.
>
> We take the current world population, which is exactly 7238010000.0 at
> the time of writing. We have to multiply this by 1.00000001 every 24
> seconds. So we can find the population at some day in the future (use
> negative arg for the past) with respect to a reference date of today,
> as follows:
>
> #include <math.h>
> double population_at(double day)
> {
> double curpop = 723801000.0;
> double rateperday = pow(1.00000001, 3600);
> return pow(rateperday, day) * curpop;
> }
>
> With a simple main() and binary search, we quickly establish (by
> determining when the population was 2, give or take a rib) that Adam
> and Eve lived about 1500 years ago.
I applaud your attempt to shoe-horn some C into this thread, but binary
search? Seriously?
log(2 / 723801000.0) / log(pow(1.00000001, 3600))
Replace 2 by the population whose date (in days from today) you want.
<snip>
> If we take the average mass of a human being at 50kg (I know, but it
> means I can do at least some of the arithmetic in my head), and the
> mass of the earth at 6E24kg, then the human race will reach one Earth
> mass at a population of 120000000000000000000000, which we'll reach in
> about the year 4531AD.
I don't get that year. I get 120000000000000000000000 people in 909493
days from today.
<snip>
--
Ben.
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 00:56 -0700
Re: primitive instruction for programming Richard Heathfield <rjh@cpax.org.uk> - 2015-04-13 09:24 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 01:59 -0700
Re: primitive instruction for programming Richard Heathfield <rjh@cpax.org.uk> - 2015-04-13 10:32 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 02:53 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 11:04 +0100
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-13 14:10 +0200
Re: primitive instruction for programming Emiliano Gomes Padilha <egpadilha@gmail.com> - 2015-04-20 14:27 -0700
Re: primitive instruction for programming Emiliano Gomes Padilha <egpadilha@gmail.com> - 2015-04-20 15:12 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-21 00:17 +0100
Re: primitive instruction for programming Emiliano Gomes Padilha <egpadilha@gmail.com> - 2015-04-22 11:07 -0700
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-21 09:04 +0200
Re: primitive instruction for programming Robert Wessel <robertwessel2@yahoo.com> - 2015-04-21 03:02 -0500
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-21 01:34 -0700
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-21 11:34 +0200
Re: primitive instruction for programming Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-21 11:48 +0100
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-21 13:10 +0200
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-21 10:53 +0100
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 20:09 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 12:48 -0700
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-14 09:40 +0200
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-14 11:24 +0100
Re: primitive instruction for programming Robert Wessel <robertwessel2@yahoo.com> - 2015-04-14 05:39 -0500
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-14 13:29 +0200
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 10:59 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 03:28 -0700
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 03:33 -0700
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 03:59 -0700
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 04:23 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 11:36 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 04:26 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 12:41 +0100
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 06:26 -0700
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-13 15:33 +0200
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 06:44 -0700
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-13 16:30 +0200
Re: primitive instruction for programming Ian Collins <ian-news@hotmail.com> - 2015-04-14 07:52 +1200
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-14 09:47 +0200
Re: primitive instruction for programming raltbos@xs4all.nl (Richard Bos) - 2015-04-14 08:10 +0000
Re: primitive instruction for programming David Brown <david.brown@hesbynett.no> - 2015-04-14 10:40 +0200
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-13 17:52 +0000
Re: primitive instruction for programming Robert Wessel <robertwessel2@yahoo.com> - 2015-04-13 18:20 -0500
Re: primitive instruction for programming Robert Wessel <robertwessel2@yahoo.com> - 2015-04-13 18:33 -0500
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-14 19:51 +0000
Re: primitive instruction for programming Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-16 09:04 -0700
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-17 02:25 +0000
Re: primitive instruction for programming Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 08:34 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-17 17:49 +0100
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-17 19:06 +0000
Re: primitive instruction for programming Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-17 20:45 -0700
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-18 16:43 +0000
Re: primitive instruction for programming Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-18 09:56 -0700
Re: primitive instruction for programming Stephen Sprunk <stephen@sprunk.org> - 2015-04-17 17:52 -0500
Re: primitive instruction for programming Morris Dovey <mrdovey@iedu.com> - 2015-04-17 18:02 -0500
Re: primitive instruction for programming Stephen Sprunk <stephen@sprunk.org> - 2015-04-17 19:26 -0500
Re: primitive instruction for programming Morris Dovey <mrdovey@iedu.com> - 2015-04-17 20:04 -0500
Re: primitive instruction for programming Michael Angelo Ravera <maravera@prodigy.net> - 2015-04-19 14:59 -0700
Re: primitive instruction for programming Richard Heathfield <rjh@cpax.org.uk> - 2015-04-20 00:19 +0100
Re: primitive instruction for programming Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-20 02:06 +0100
Re: primitive instruction for programming Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-20 02:26 +0100
Re: primitive instruction for programming Richard Heathfield <rjh@cpax.org.uk> - 2015-04-20 02:18 +0100
Re: primitive instruction for programming Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-18 18:59 -0700
Re: primitive instruction for programming Steve Thompson <stevet810@gmail.com> - 2015-04-19 16:28 +0000
Re: primitive instruction for programming Richard Damon <Richard@Damon-Family.org> - 2015-04-19 17:16 -0400
Re: primitive instruction for programming Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-22 15:28 -0700
Re: primitive instruction for programming John Bode <jfbode1029@gmail.com> - 2015-04-23 07:20 -0700
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 03:07 -0700
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 09:47 -0700
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 11:09 -0700
Re: primitive instruction for programming Noob <root@127.0.0.1> - 2015-04-13 20:43 +0200
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 12:09 -0700
Re: primitive instruction for programming Xcott Craver <xcottcraver@gmail.com> - 2015-04-14 07:11 -0700
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-14 07:28 -0700
Re: primitive instruction for programming Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-14 15:57 +0100
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-14 08:13 -0700
Re: primitive instruction for programming fir <profesor.fir@gmail.com> - 2015-04-13 14:02 -0700
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 14:28 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 22:51 +0100
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 14:58 -0700
Re: primitive instruction for programming Bartc <bc@freeuk.com> - 2015-04-13 23:25 +0100
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 15:37 -0700
Re: primitive instruction for programming James Kuyper <jameskuyper@verizon.net> - 2015-04-13 19:09 -0400
Re: primitive instruction for programming fmassei@gmail.com - 2015-04-13 16:20 -0700
Re: primitive instruction for programming Robert Wessel <robertwessel2@yahoo.com> - 2015-04-13 18:03 -0500
Re: primitive instruction for programming asetofsymbols@gmail.com - 2015-04-13 20:58 -0700
Re: primitive instruction for programming fir <profesor.fir@gmail.com> - 2015-04-13 15:02 -0700
csiph-web