Ticket #8491: randoms.cpp

    #include <boost/random/taus88.hpp>
    #include <boost/random/discrete_distribution.hpp>
    #include <list>
    #include <iostream>
    #include <iterator>
    #include <algorithm>

    std::list<int> l;

    std::list<double> probs;

    int main()
    {
        l.push_back(-5); l.push_back(-3); l.push_back(-1); l.push_back(0); l.push_back(2); l.push_back(4); l.push_back(6);
        probs.push_back(-100); probs.push_back(-50); probs.push_back(-5); probs.push_back(0); probs.push_back(12); probs.push_back(75); probs.push_back(150);
        auto minmax = std::minmax_element(probs.begin(), probs.end());
        for (auto it = probs.begin(); it != probs.end(); ++it)
        {
                (*it) += std::abs(*(minmax.first)) + (std::abs(*(minmax.first)) + std::abs(*(minmax.second))) / 2.0 + 1;
        }
        std::cout << "Weights:";
        for (auto it = probs.begin(); it != probs.end(); ++it)
        {
            std::cout << " " << *it;
        }
        std::cout << std::endl;
        boost::random::taus88 rng(0x13141516);
        boost::random::discrete_distribution<> distr(probs.begin(), probs.end());

        std::cout << "Probabilities:";
        for (auto it = distr.probabilities().begin(); it != distr.probabilities().end(); ++it)
        {
            std::cout << " " << *it;
        }
        std::cout << std::endl;
        std::cout << "Rollin..." << std::endl;
        for (int i = 0; i < 1000; ++i) {
            std::list<int>::iterator rolled = l.begin();
            std::advance(rolled, distr(rng));
            std::cout << "Rolled " << *rolled << std::endl;
        }
        return 0;
    }