Hi,
The precision of built-in date type of C is very low. Even using long
double float type or double float type, we can only use 12 or 16 digits
after the decimal point. What can we do if we want to use
high-precision number such as the number with 50 digits after the
decimal point. Can we define a user date type?
Mar 31 '06
15  4001 
stathis gotsis wrote: "Mark McIntyre" <ma**********@s pamcop.net> wrote in message
news:io******** *************** *********@4ax.c om... On Fri, 31 Mar 2006 22:55:53 GMT, in comp.lang.c , Martin Ambuhl
<ma*****@earthl ink.net> wrote:
Mark McIntyre wrote:
Consider that the
relative error for G, the Newtonian gravitational constant, is 1.5e-4 in
the 2002 CODATA values.
This is a /physically observed/ constant. Its by definition not
accurate.
Well, many physical constants are meausred through experiments. I think the
relatively low accuracy in the measurement of the gravitational constant is
due to the fact that gravitational forces are rather weak.
Astronomy is an extremely poorly chosen example
for your purposes.
Apparently you're not an astronomer.
Nonsense. No sane person is using floating point types for finance, in
the first place. Such a person will be fired before the day is out,
anyway, so the number of significant digits is irrelevant.
Go tell that to the thousands of people using it every single day in
the City, New York .Tokyo, Frankfurt. etc.
Sorry, but you really have absolutely no idea what you're talking
about. I've worked in the City for 15 years now, and I do.
I apologize for my ignorance: City==London?
Not exactly. The City is part of London, where the banks are. Piccadilly
and Hyde Park are also parts of London but are not The City.
--
Joe Wright
"Everything should be made as simple as possible, but not simpler."
--- Albert Einstein ---
On Sun, 2 Apr 2006 03:31:21 +0300, in comp.lang.c , "stathis gotsis"
<st***********@ hotmail.com> wrote: about. I've worked in the City for 15 years now, and I do.
I apologize for my ignorance: City==London?
Yes, the City of London is the actual name of the borough that
comprises the central part of London. It contains the financial and
commerce district, barring a few weirdos who've moved to Docklands. http://www.cityoflondon.gov.uk/Corpo...undary_map.htm
Mark McIntyre
--
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
Joe Wright <jo********@com cast.net> wrote: stathis gotsis wrote: "Mark McIntyre" <ma**********@s pamcop.net> wrote in message
news:io******** *************** *********@4ax.c om... On Fri, 31 Mar 2006 22:55:53 GMT, in comp.lang.c , Martin Ambuhl
<ma*****@earthl ink.net> wrote:
Nonsense. No sane person is using floating point types for finance, in
the first place. Such a person will be fired before the day is out,
anyway, so the number of significant digits is irrelevant.
Go tell that to the thousands of people using it every single day in
the City, New York .Tokyo, Frankfurt. etc.
Sorry, but you really have absolutely no idea what you're talking
about. I've worked in the City for 15 years now, and I do.
He said _sane_ people. Given the position of economy on the scientific
ladder (basically that of an amputated walrus trying desperately to
climb up, but too stupid and ungainly to find the first rung), it
shouldn't surprise anyone that major financial centres run on what is
basically guesswork. Scare, perhaps, but not surprise.
I apologize for my ignorance: City==London?
Not exactly. The City is part of London, where the banks are. Piccadilly
and Hyde Park are also parts of London but are not The City.
Not officially. The City is London, also known as the Square Mile (which
is more or less accurate). Piccadilly is Westminster, and so is Hyde
Park. What you're thinking of is Greater London.
Richard
On Mon, 03 Apr 2006 07:00:23 GMT, in comp.lang.c , rl*@hoekstra-uitgeverij.nl (Richard Bos) wrote: He said _sane_ people.
Sorry, I missed that bit. The wall sign was actually invented by us
city types I think. :-)
shouldn't surprise anyone that major financial centres run on what is
basically guesswork.
Options pricing, anyone?
Scare, perhaps, but not surprise.
And most of it runs on Windows desktops.....
you can run, but you cant' hide... > I apologize for my ignorance: City==London?
Not exactly. The City is part of London, where the banks are. Piccadilly
and Hyde Park are also parts of London but are not The City.
Not officially. The City is London, also known as the Square Mile (which
is more or less accurate). Piccadilly is Westminster, and so is Hyde
Park. What you're thinking of is Greater London.
Yer all wrong. The City Of London is an entire city all of its own,
surrounded by more plebeian regions such as Islington, Westminster,
Southwark etc....
Mark McIntyre
--
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan
Mark McIntyre <ma**********@s pamcop.net> wrote: On Mon, 03 Apr 2006 07:00:23 GMT, in comp.lang.c ,
rl*@hoekstra-uitgeverij.nl (Richard Bos) wrote:
> I apologize for my ignorance: City==London?
Not exactly. The City is part of London, where the banks are. Piccadilly
and Hyde Park are also parts of London but are not The City.
Not officially. The City is London, also known as the Square Mile (which
is more or less accurate). Piccadilly is Westminster, and so is Hyde
Park. What you're thinking of is Greater London.
Yer all wrong. The City Of London is an entire city all of its own,
surrounded by more plebeian regions such as Islington, Westminster,
Southwark etc....
That's what I said, innit? Although I wouldn't describe Westmonasterium
as plebeian. Upstart, perhaps.
Of course, all poor saps who _work_ in the City actually come from the
borough to the North-East...
Richard
Martin Ambuhl wrote: When 15 significant
decimal digits allows expressing the average distance from the sun to
the earth to with 0.15 mm, that is high accuracy, indeed.
Just a nit:
I believe you mean high precision, not accuracy. One could say the
distance from the earth to the sun is 0.123456789 meters which is
(relatively) very precise, but not accurate.
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