std::generate_canonical
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| template< class RealType, size_t bits, class Generator > RealType generate_canonical( Generator& g ); |
(depuis C++11) | |
Génère un nombre aléatoire à virgule flottante dans la gamme [0; 1) .
Original:
Generates a random floating point number in range [0; 1).
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g() est appelé autant de fois que nécessaire pour générer suffisamment d'entropie, c'est à dire parfois moins max(1, ⌈ min(b
1, b
2) / log
2 R ⌉), où
1, b
2) / log
2 R ⌉), où
Original:
g() is called as many times as needed to generate enough entropy, i.e. at least max(1, ⌈ min(b
1, b
2) / log
2 R ⌉) times, where
1, b
2) / log
2 R ⌉) times, where
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- b1 = std::numeric_limits<RealType>::digits
- b2 = std::numeric_limits<RealType>::bits
- R = g.max() - g.min() + 1.
Sommaire |
[modifier] Paramètres
| g | - | Générateur à utiliser pour l'acquisition d'entropie
Original: generator to use to acquire entropy The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[modifier] Retourne la valeur
Valeur à virgule flottante dans la gamme [0; 1) .
Original:
Floating point value in range [0; 1).
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[modifier] Exceptions
Aucune exception de ceux qui sont projetés par
gOriginal:
None except from those thrown by
gThe text has been machine-translated via Google Translate.
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[modifier] Exemple
produire des nombres aléatoires avec 10 bits d'aléa: cela peut produire seulement 1024 valeurs distinctes
Original:
produce random numbers with 10 bits of randomness: this may produce only 1024 distinct values
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#include <random> #include <iostream> int main() { std::random_device rd; std::mt19937 gen(rd()); for(int n=0; n<10; ++n) { std::cout << std::generate_canonical<double, 10>(gen) << ' '; } }
Résultat :
0.208143 0.824147 0.0278604 0.343183 0.0173263 0.864057 0.647037 0.539467 0.0583497 0.609219
[modifier] Voir aussi
| (C++11) |
produit des valeurs réelles uniformément distribués dans une zone Original: produces real values evenly distributed across a range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe générique) |
