Boost C++ Libraries: Ticket #11: why not using mt19937?
https://svn.boost.org/trac10/ticket/11
<pre class="wiki">i complie the random_demo.cpp, everything is ok.
( VC6 + SP5 )
following is code:
/* boost random_demo.cpp profane demo
*
* Copyright Jens Maurer 2000
* Permission to use, copy, modify, sell, and
distribute this software
* is hereby granted without fee provided that the
above copyright notice
* appears in all copies and that both that copyright
notice and this
* permission notice appear in supporting
documentation,
*
* Jens Maurer makes no representations about the
suitability of this
* software for any purpose. It is provided "as is"
without express or
* implied warranty.
*
* $Id: random_demo.cpp,v 1.5 2001/05/31 17:19:14
jmaurer Exp $
*
* A short demo program how to use the random number
library.
*/
#include <iostream>
#include <fstream>
#include <ctime> // std::time
#include <boost/random/linear_congruential.hpp>
#include <boost/random/uniform_smallint.hpp>
#include <boost/random/uniform_01.hpp>
// try boost::mt19937 or boost::ecuyer1988 instead of
boost::minstd_rand
typedef boost::minstd_rand base_generator_type;
// This is a reproducible simulation experiment.
void experiment(base_generator_type & generator)
{
boost::uniform_smallint<base_generator_type> die
(generator, 1, 6);
// you can use a STL Iterator interface
for(int i = 0; i < 10; i++)
std::cout << *die++ << " ";
std::cout << '\n';
}
int main()
{
// initialize by reproducible seed
base_generator_type generator(42);
std::cout << "10 samples of a uniform distribution
in [0..1):\n";
boost::uniform_01<base_generator_type> uni
(generator);
std::cout.setf(std::ios::fixed);
// you can also use a STL Generator interface
for(int i = 0; i < 10; i++)
std::cout << uni() << '\n';
// change seed to something else
// Note: this is not the preferred way of hacking
around missing std::
generator.seed(
#ifndef BOOST_NO_STDC_NAMESPACE
std::
#endif
time(0));
std::cout << "\nexperiment: roll a die 10 times:\n";
base_generator_type saved_generator = generator;
experiment(generator);
std::cout << "redo the experiment to verify it:\n";
experiment(saved_generator);
// after that, both generators are equivalent
assert(generator == saved_generator);
#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
{
// save the generator state for future use,
// can be read again at any time via operator>>
std::ofstream file("rng.saved",
std::ofstream::trunc);
file << generator;
}
#endif
// Some compilers don't pay attention to
std:3.6.1/5 and issue a
// warning here if "return 0;" is omitted.
return 0;
}
however, i use
typedef boost::boost::mt19937 base_generator_type;
this sentence instead of old
typedef boost::minstd_rand base_generator_type;
sentence, complier report error:
"
d:\project\boost_1_25_0
\boost\random\mersenne_twister.hpp(86) : error C2064:
term does not evaluate to a function
d:\project\boost_1_25_0
\boost\random\mersenne_twister.hpp(66) : see
reference to function template instantiation 'void
__thiscall boost::random::mersenne_twister<unsigned
long,624,397,31,-1727483681,11,7,-1658038656,15,-
272236544,18,-9485417
30>::seed(const int &)' being compiled
"
i don't know why???who can tell me?
</pre>en-usBoost C++ Libraries/htdocs/site/boost.png
https://svn.boost.org/trac10/ticket/11
Trac 1.4.3jmaurerThu, 08 Nov 2001 22:00:57 GMTstatus changed
https://svn.boost.org/trac10/ticket/11#comment:1
https://svn.boost.org/trac10/ticket/11#comment:1
<ul>
<li><strong>status</strong>
<span class="trac-field-old">assigned</span> → <span class="trac-field-new">closed</span>
</li>
</ul>
<pre class="wiki">Logged In: YES
user_id=53943
I've checked in changes to random_demo.cpp which should
allow flawless interaction with mt19937.
Please check out the CVS.
</pre>
Ticket