std::generate_canonical
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template<class RealType, size_t bits, class Generator > RealType generate_canonical( Generator& g ); | (desde C++11) | |
Gera um número de ponto flutuante aleatório na faixa [0; 1).
Original:
Generates a random floating point number in range [0; 1).
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g() é chamado tantas vezes quanto necessário para gerar entropia suficiente, isto é, por vezes, pelo menos max(1, ⌈ min(b
1, b
2) / log
2 R ⌉), onde
1, b
2) / log
2 R ⌉), onde
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.
Índice |
[editar]Parâmetros
| g | - | gerador de usar para adquirir entropia 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. |
[editar]Valor de retorno
Valor de ponto flutuante no intervalo [0; 1).
Original:
Floating point value in range [0; 1).
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[editar]Exceções
Nenhum exceto aqueles lançadas pelo
gOriginal:
None except from those thrown by
gThe text has been machine-translated via Google Translate.
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[editar]Exemplo
produzir números aleatórios com 10 bits de aleatoriedade: isso pode produzir apenas 1024 valores distintos
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)<<' ';}}
Saída:
0.208143 0.824147 0.0278604 0.343183 0.0173263 0.864057 0.647037 0.539467 0.0583497 0.609219
[editar]Veja também
(C++11) | produz valores reais uniformemente distribuídos em um intervalo 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. (modelo de classe) |
