std::seed_seq(3) C++ Standard Libary std::seed_seq(3) NAME std::seed_seq - std::seed_seq Synopsis Defined in header <random> class seed_seq; (since C++11) std::seed_seq consumes a sequence of integer-valued data and produces a requested number of unsigned integer values i, 0 ax i < 232 , based on the consumed data. The produced values are distributed over the entire 32-bit range even if the consumed values are close. It provides a way to seed a large number of random number engines or to seed a generator that requires a lot of entropy, given a small seed or a poorly distributed initial seed sequence. std::seed_seq meets the requirements of SeedSequence. Member types Member type Definition result_type (C++11) std::uint_least32_t Member functions constructor constructs and seeds the std::seed_seq object (C++11) (public member function) operator= seed_seq is not assignable [deleted] (C++11) (public member function) generate calculates the bias-eliminated, evenly distributed 32-bit values (C++11) (public member function) size obtains the number of 32-bit values stored in std::seed_seq (C++11) (public member function) param obtains the 32-bit values stored in std::seed_seq (C++11) (public member function) Example // Run this code #include <cstdint> #include <iostream> #include <random> int main() { std::seed_seq seq{1, 2, 3, 4, 5}; std::vector<std::uint32_t> seeds(10); seq.generate(seeds.begin(), seeds.end()); for (std::uint32_t n : seeds) std::cout << n << '\n'; } Possible output: 4204997637 4246533866 1856049002 1129615051 690460811 1075771511 46783058 3904109078 1534123438 1495905678 http://cppreference.com 2024.06.10 std::seed_seq(3)
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