Using either the std::tr1 or C++0x std:: random number generators, the
uniform_real distribution produces numbers that are completely wrong.
For instance, using Boost.Random the test program produces this sequence of
floating point numbers:
Random real: 0.0975404
Random real: 0.547221
Random real: 0.278498
...
On the other hand, both the TR1 and C++0x random number generators produce
something like
Random real: 4.18933e+08
Random real: 2.35029e+09
Random real: 1.19614e+09
...
instead.
This is using the mt19937 random number generator engine and the uniform_real
distribution. I have tried both uniform_real<float> and uniform_real<double>
and they both have this bug.
--
Summary: uniform_real random number distribution produces wildly
out of range values (TR1 & C++0x)
Product: gcc
Version: 4.3.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: colin at gibibit dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40331
