A really quick boost::random guide
This is a really short and quick guide on how to use
boost::random. The best place to start is, as always, the documentation, but Boost also provides a simple sample program that covers the library in a good "how to get started" fashion.
What I'm about to write here is even shorter and less detailed -- it's just the basic code needed to generate some random numbers.
// Initialize a random number generator. // Boost provides a bunch of these, note that some of them are not meant // for direct user usage and you should instead use a specialization (for // example, don't use linear_congruential and use minstd_rand or // minstd_rand0 instead) // This constructor seeds the generator with the current time. // As mentioned in Boost's sample program, time(0) is not a great seed, // but you can probably get away with it for most situations. // Consider using more precise timers such as gettimeofday on *nix or // GetTickCount/timeGetTime/QueryPerformanceCounter on Windows. boost::mt19937 randGen(std::time(0)); // Now we set up a distribution. Boost provides a bunch of these as well. // This is the preferred way to generate numbers in a certain range. // In this example we initialize a uniform distribution between 0 and the max // value that an unsigned char can hold (255 for most architectures) boost::uniform_int<> uInt8Dist(0, std::numeric_limits<unsigned char>::max()); // Finally, declare a variate_generator which maps the random number // generator and the distribution together. This variate_generator // is usable like a function call. boost::variate_generator< boost::mt19937&, boost::uniform_int<> > GetRand(randGen, uInt8Dist); // Generate a random number int aRandomNumber = GetRand();