Mantissa string from mpf_get_str can be wrong in some least-significant digits
tg at gmplib.org
Sat Sep 12 22:43:19 CEST 2009
Uwe Mueller <um.computing at arcor.de> writes:
This bug report concerns GMP versions 4.2.1, 4.3.1 and probably also
others. It contains a test program, error description and a suggested
The issue is shown by the attached test program. It calculates the
string representation of some big numbers by the function mpf_get_str
with different values for n_digits. The respective result is compared
with the exact (n_digits = 0) result. The differences are displayed.
The test program does not take any arguments.
[Sorry for the slow answer]
I don't see any test program as part of your message. Perhaps
you forgot to include it?
I think the current code, as of July 2009, should work better. Please
see http://gmplib.org:8000/gmp-4.3/ or specifically this change:
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