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Random Number Generation for C++11, thanks to http://cpplover.blogspot.jp/2009/11/c0xrandom.html
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#include <random> | |
#include <iterator> | |
template<class RandomGen> | |
auto make_random_values(RandomGen&& gen, std::size_t n) | |
-> std::vector<typename RandomGen::result_type> { | |
std::vector<typename RandomGen::result_type> result; | |
result.reserve(n); | |
for (std::size_t i = 0; i < n; ++i) { | |
result.push_back(gen()); | |
} | |
return result; | |
} | |
template<class RandomEngine, class Seeds> | |
RandomEngine make_random_engine_from_seeds(Seeds const& seeds) { | |
using std::begin; | |
using std::end; | |
std::seed_seq sseq(begin(seeds), end(seeds)); | |
return RandomEngine(sseq); | |
} | |
std::mt19937& get_random_generator() { | |
thread_local std::mt19937 gen = | |
make_random_engine_from_seeds<std::mt19937>( | |
make_random_values(std::random_device(), 16)); | |
return gen; | |
} | |
#include <iostream> | |
int main() { | |
auto& gen = get_random_generator(); | |
std::uniform_int_distribution<> dist(1, 6); | |
for (int i = 0; i < 10; ++i) { | |
std::cout << dist(gen) << std::endl; | |
} | |
} |
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