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    std::seed_seq::generate

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    C++
     
    Numerik-Bibliothek
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    iota(C++11)
    accumulate
    inner_product
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    Pseudo-Zufallszahlen
    Motoren und Adaptern
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    Engines and engine adaptors
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    linear_congruential_engine(C++11)
    mersenne_twister_engine(C++11)
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    Distributions
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    Uniform distributions
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    uniform_int_distribution(C++11)
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    Bernoulli distributions
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    Poisson distributions
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    Seed-Sequenzen
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    C library
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    rand
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    std::seed_seq
    Member-Funktionen
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    seed_seq::seed_seq
    seed_seq::generate
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    template<class RandomIt >
    void generate( RandomIt begin, RandomIt end );
    		(seit C++11)
    Füllt den Bereich [begin, end) mit unsigned Integer-Werte i, 0 ≤ i < 232
    , basierend auf den Daten, die ursprünglich in den Konstruktor dieses seed_seq vorgesehen. Die erzeugten Werte werden über den gesamten 32-Bit-Bereich, auch wenn die ursprünglichen Werte stark vorgespannt wurden verteilt .
    Original:
    Fills the range [begin, end) with unsigned integer values i, 0 ≤ i < 232
    , based on the data originally provided in the constructor of this seed_seq. The produced values are distributed over the entire 32-bit range even if the initial values were strongly biased.
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    Der folgende Algorithmus verwendet wird (aus der Initialisierung des Mersenne Twister Generator Makoto Matsumoto and Takuji Nishimura, unter Einbeziehung der Verbesserungen durch Mutsuo Saito in 2007 gemacht)
    Original:
    The following algorithm is used (adapted from the initialization sequence of the Mersenne Twister generator by Makoto Matsumoto and Takuji Nishimura, incorporating the improvements made by Mutsuo Saito in 2007)
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    • Wenn begin == end, nichts zu tun. Andernfalls
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      If begin == end, do nothing. Otherwise,
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    • Zunächst müssen Sie jedes Element des Leistungsbereich auf den Wert 0x8b8b8b8b
      Original:
      First, set each element of the output range to the value 0x8b8b8b8b
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    • Transformieren der Elemente der Ausgangsbereich nach folgendem Algorithmus:
      Original:
      Transform the elements of the output range according to the following algorithm:
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    For k =0,..., m-1

    wo m=max(s+1, n)
    Original:
    where m=max(s+1, n)
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    and n=begin-end
    and s=v.size()

    und v ist die private Behälter, der die Werte, die ursprünglich durch den Konstruktor dieses seed_seq Objekt zur Verfügung gestellt
    Original:
    and v is the private container holding the values originally provided by the constructor of this seed_seq object,
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    1. begin[k+p]+= r1
    2. begin[k+q]+= r2
    3. begin[k]= r2,
    wo p=(n-t)/2
    Original:
    where p=(n-t)/2
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    and q=p+t
    and t=(n >=623)?11:(n >=68)?7:(n >=39)?5:(n >=7)?3:(n -1)/2
    and r1=1664525* T(begin[k]^begin[k+p]^begin[k−1])
    and T(x)= x ^(x <<27)
    and r2=r1+s if k==0, r2=r1 + k%n + v[k-1] if 0<k<=s, r2=r1 + k%n if k>s.

    For k = m,..., m+n-1,

    1. begin[k+p]^= r3
    2. begin[k+q]^= r4
    3. begin[k]=r4
    wo r3 =1566083941* T(begin[k]+begin[k+p]+begin[k-1])
    Original:
    where r3 =1566083941* T(begin[k]+begin[k+p]+begin[k-1])
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    and r4=r3 - k%n

    wo alle Berechnungen modulo 232
     durchgeführt und wo die Indexierung der Leistungsbereich (begin[x]) wird modulo n genommen .
    Original:
    where all calculations are performed modulo 232
     and where the indexing of the output range (begin[x]) is taken modulo n.
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    [Bearbeiten]Parameter

    begin, end -
    mutable Random-Access-Iteratoren, deren std::iterator_traits<>::value_type ist eine vorzeichenlose Integer-Typ geeignet zur Aufbewahrung von 32-Bit-Werte
    Original:
    mutable random-access iterators whose std::iterator_traits<>::value_type is an unsigned integer type suitable for storing 32-bit values
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    Type requirements
    -
    RandomIt must meet the requirements of RandomAccessIterator.

    [Bearbeiten]Rückgabewert

    none, werden die Ergebnisse der [begin, end) Bereich geschrieben .
    Original:
    none, the results are written to the [begin, end) range.
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    [Bearbeiten]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());// Step 1: fill with 0x8b8b8b8b// seeds = {2341178251, 2341178251, 2341178251, 2341178251, 2341178251,// 2341178251, 2341178251, 2341178251, 2341178251, 2341178251 }//// Step 2: // n = 10, s = 5, t = 3, p = 3, q = 6, m = 10//// First iteration, k = 0; r1 = 1371501266, r2 = 1371501271//// seeds = {1371501271, 2341178251, 2341178251, 3712679517, 2341178251,// 2341178251, 3712679522, 2341178251, 2341178251, 2341178251 }//// Iterations from k = 1 to k = 5 (r2 = r1 + k%n + v[k-1])//// r1 = 2786190137, 3204727651, 4173325571, 1979226628, 401983366// r2 = 2786190139, 3204727655, 4173325577, 1979226636, 401983376//// seeds = {3350727907, 3188173515, 3204727655, 4173325577, 1979226636,// 401983376, 3591037797, 2811627722, 1652921976, 2219536532 } //// Iterations from k = 6 to k = 9 (r2 = r1 + k%n)//// r1 = 2718637909, 1378394210, 2297813071, 1608643617// r2 = 2718637915, 1378394217, 2297813079, 1608643626//// seeds = { 434154821, 1191019290, 3237041891, 1256752498, 4277039715,// 2010627002, 2718637915, 1378394217, 2297813079, 1608643626 } //// Step 3// iterations from k = 10 to k = 19, using ^= to modify the output//// r1 = 1615303485, 3210438310, 893477041, 2884072672, 1918321961,// r2 = 1615303485, 3210438309, 893477039, 2884072669, 1918321957//// seeds = { 303093272, 3210438309, 893477039, 2884072669, 1918321957,// 1117182731, 1772877958, 2669970405, 3182737656, 4094066935 }//// r1 = 423054846, 46783064, 3904109085, 1534123446, 1495905687// r2 = 423054841, 46783058, 3904109078, 1534123438, 1495905678//// seeds = { 4204997637, 4246533866, 1856049002, 1129615051, 690460811,// 1075771511, 46783058, 3904109078, 1534123438, 1495905678 }   for(std::uint32_t n : seeds)std::cout<< n <<'\n';}

    Output: 

    4204997637 4246533866 1856049002 1129615051 690460811 1075771511 46783058 3904109078 1534123438 1495905678
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/numeric/random/seed_seq/generate&oldid=29840“
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