A copy-paste from Python Shell:
a = 1
a
1
a = a + 0.4
a
1.3999999999999999
a = a - 0.4
a
0.99999999999999989
a == 1
False
Best regards
Inga
PS I always talk to my informatics-students: You never-ever do with
real-variables something like this: if real1 = real2 then ...
Real numbers can be equal with some precision.
On Tue, 30 Oct 2007, Andrea Mauri wrote:
But someone tried to reproduce the example with other programming languages?
mm ha scritto:
Tom Verhoeff a écrit :
In fact, the GMP (GNU Multiple Precision Arithmetic Library <gmplib.org>)
offers this and more. Unfortunately, there does not seem to be a complete
FreePascal interface for it. Maybe it is easy to adapt (if necessary?)
the GNU Pascal interface for GMP <http://www.gnu-pascal.de/gpc/GMP.html>.
I would be interested.
But there are multi-precision libraries for Free Pascal.
The one I am writing:
"NX" (big integers, big reals, big complexes, big polynomials
over GF(2)) at
http://www.ellipsa.net/
An other one:
"MPINT" (big integers, big rationals) at
http://home.netsurf.de/wolfgang.ehrhardt/misc_en.html#mpint
And there are others.
mm
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