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    std::seed_seq

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    <metanoindex/>

     
    C++
     
    Numerik-Bibliothek
    Gemeinsame mathematischen Funktionen
    Floating-Point-Umgebung
    Komplexe Zahlen
    Numerische Arrays
    Pseudo-Zufallszahlen
    Compile-time rationale Arithmetik (C++11)
    Generische numerische Operationen
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    Generic numeric operations
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    iota(C++11)
    accumulate
    inner_product
    adjacent_difference
    partial_sum
     
    Pseudo-Zufallszahlen
    Motoren und Adaptern
    Original:
    Engines and engine adaptors
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    linear_congruential_engine(C++11)
    mersenne_twister_engine(C++11)
    subtract_with_carry_engine(C++11)
    discard_block_engine(C++11)
    independent_bits_engine(C++11)
    shuffle_order_engine(C++11)
    Generatoren
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    Generators
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    random_device(C++11)
    Ausschüttungen
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    Distributions
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    Uniform-Distributionen
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    Uniform distributions
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    uniform_int_distribution(C++11)
    uniform_real_distribution(C++11)
    generate_canonical(C++11)
    Bernoulli-Distributionen
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    Bernoulli distributions
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    bernoulli_distribution(C++11)
    binomial_distribution(C++11)
    negative_binomial_distribution(C++11)
    geometric_distribution(C++11)
    Poisson-Verteilungen
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    Poisson distributions
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    poisson_distribution(C++11)
    exponential_distribution(C++11)
    gamma_distribution(C++11)
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    Normalverteilungen
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    Normal distributions
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    normal_distribution(C++11)
    lognormal_distribution(C++11)
    chi_squared_distribution(C++11)
    cauchy_distribution(C++11)
    fisher_f_distribution(C++11)
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    Sampling-Distributionen
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    Sampling distributions
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    discrete_distribution(C++11)
    piecewise_constant_distribution(C++11)
    piecewise_linear_distribution(C++11)
    Seed-Sequenzen
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    Seed Sequences
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    seed_seq(C++11)
    C-Bibliothek
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    C library
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    rand
    srand
    RAND_MAX
     
    std::seed_seq
    Member-Funktionen
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    Member functions
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    seed_seq::seed_seq
    seed_seq::generate
    seed_seq::size
    seed_seq::param
     
    <tbody> </tbody>
    definiert in Header <random>
    class seed_seq;
    		 (seit C++11)
    std::seed_seq verbraucht eine Folge von ganzzahligen Daten und erzeugt eine angeforderte Anzahl von nicht-vorzeichenbehafteten Ganzzahlen i, 0 ≤ i < 232
    , bezogen auf den verbrauchten Daten. Die erzeugten Werte werden über den gesamten 32-Bit-Bereich, auch wenn die verbrauchten Werte nahe verteilt sind .
    Original:
    std::seed_seq consumes a sequence of integer-valued data and produces a requested number of unsigned integer values i, 0 ≤ 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.
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    Es bietet eine Möglichkeit, Saatgut eine große Anzahl von Zufallszahlen Motoren oder auf Saatgut einen Generator, der eine Menge von Entropie erfordert, da ein kleiner Samen oder eine schlecht verteilt Anfangssaatmaterial Sequenz .
    Original:
    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.
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    std::seed_seq erfüllt die Anforderungen der SeedSequence .
    Original:
    std::seed_seq meets the requirements of SeedSequence.
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    Mitglied Typen

    Mitglied Typ
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    Member type
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    		 Definition
    result_type std::uint_least32_t

    Member-Funktionen
    Konstrukte und Samen die std :: seed_seq Objekt
    Original:
    constructs and seeds the std::seed_seq object
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    (öffentliche Elementfunktion)
    operator=
    (gelöscht)
    nicht kopieren übertragbar
    Original:
    not copy-assignable
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    (öffentliche Elementfunktion)
    berechnet die Verzerrung eliminiert, gleichmäßig verteilte 32-Bit-Werte
    Original:
    calculates the bias-eliminated, evenly distributed 32-bit values
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    (öffentliche Elementfunktion)
    erhält die Anzahl von 32-Bit-Werte in std :: seed_seq gespeichert
    Original:
    obtains the number of 32-bit values stored in std::seed_seq
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    (öffentliche Elementfunktion)
    erhält die 32-Bit-Werte in std :: seed_seq gespeichert
    Original:
    obtains the 32-bit values stored in std::seed_seq
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    (öffentliche Elementfunktion)

    Beispiel

    #include <random>
#include <iostream>

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';
}

    Output: 

    4204997637
4246533866
1856049002
1129615051
690460811
1075771511
46783058
3904109078
1534123438
1495905678