Re: [Boost-users] [random] getting a 50% probability generator

Brian Stadler wrote:

A few things,

First, try this when creating your uniform_01 object,

typedef boost::uniform_01boost::mt19937 random_real; <--you typedef'ed it here. random_real actual_generator; actual_generator() <----to output numbers between 0 and 1.

Two, don't use uniform_01. The uniform_real class works much better and defaults to between 0 and 1.

Three, it looks like you are wanting random ints 0 and 1, not random real numbers between 0 and 1. For this have a look at the uniform_int or uniform_smallint class. They are probably what you are looking for.

Hope this helps.

Brian Thanks for this information. It looks like I indeed need uniform_smallint, but I'm having trouble with it. This is what I'm trying to compile:

std::tr1::mt19937 rng; boost::uniform_smallint<int> six(1,6); boost::variate_generator die(rng, six); int x = die(); Note this from a boost webpage, with slight modifications. The compiler error I'm getting is: ../test.cpp:15: error: no matching function for call to 'boost::variate_generator::variate_generator()' $BOOST_ROOT/boost/random/variate_generator.hpp:97: note: candidates are: boost::variate_generator::variate_generator(Engine, Distribution) [with Engine = std::tr1::mt19937&, Distribution = boost::uniform_smallint<int>] Can somebody point out what my problem is?