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floating point precision problem

i need to get high presion float numbers.

say, i need pi = 22/7.0 = 3.142857....(up to 80 digits)

is it possible ?

does gcc/g++ compiler can give such type of high precision??

plz GIVE A SMALL CODE HOW CAN I ACHIEVE THAT ? which way, i have to
write the code??
Question2: AT most how much precision can gcc/g++ AND VC++ Give?

can i write

double double double double x = 22/7.0 ? ... so that it could hold
highly precise result.
Nov 14 '05
21 12695
CBFalconer <cb********@yah oo.com> writes:
Keith Thompson wrote:
CBFalconer <cb********@yah oo.com> writes:
... snip ...
No it isn't (just made up). AGMTA.


All Great Minds Think Alike


(And So Do Ours.)

Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://www.sdsc.edu/~kst>
Schroedinger does Shakespeare: "To be *and* not to be"
Nov 14 '05 #21
In article <bv**********@n ewsg3.svr.pol.c o.uk> "Malcolm" <ma*****@55bank .freeserve.co.u k> writes:

"P.J. Plauger" <pj*@dinkumware .com> wrote in message
Sun Sparcs are in pretty common use. They have 128-bit floating-
point format. And every compiler I know calls it long double.

So what do they use for 80 bits?

As far as I know: nothing. That is not a standard type on the Sparc.
You would also have a hard time finding a floating point type with
80 bits mantissa on the Cray. The mantissa is either 48 bits or
96 bits.
dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924131
home: bovenover 215, 1025 jn amsterdam, nederland; http://www.cwi.nl/~dik/
Nov 14 '05 #22

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