std::discrete_distribution
De cppreference.com
 [] |
This page has been machine-translated from the English version of the wiki using Google Translate.
The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
![[]](https://upload.cppreference.com/mwiki/images/3/31/Imbox_notice.png){kind=link}
<metanoindex/>
<tbody> </tbody>| Dclar dans l'en-tte <random>
|
||
template< class IntType = int > class discrete_distribution; |
(depuis C++11) | |
std::discrete_distribution produit des nombres entiers alatoires sur la [0, n) intervalle, o la probabilit de chaque individu i entier est calcule selon wi/S, c'est le' poids de l'entier
ith divise par la somme de tous les poids n . Original:
std::discrete_distribution produces random integers on the interval [0, n), where the probability of each individual integer i is defined as wi/S, that is the weight of the
ith integer divided by the sum of all n weights. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Types de membres
| Type du membre | Dfinition |
result_type
|
IntType
|
param_type
|
le type du jeu de paramtres, sans prcision
Original: the type of the parameter set, unspecified The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Fonctions membres
construit distribution Original: constructs new distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
rinitialise l'tat interne de la distribution Original: resets the internal state of the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
gnre le nombre alatoire suivant dans la distribution Original: generates the next random number in the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
obtient la liste des probabilits Original: obtains the list of probabilities The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
obtient ou dfinit l'objet de paramtre de distribution Original: gets or sets the distribution parameter object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
renvoie la valeur minimale potentiellement gnres Original: returns the minimum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
renvoie la valeur maximale potentiellement gnres Original: returns the maximum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) | |
Fonctions annexes
compare deux objets de distribution Original: compares two distribution objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) | |
effectue flux d'entre et de sortie sur la distribution de nombre pseudo-alatoire Original: performs stream input and output on pseudo-random number distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction) | |
Exemple
#include <iostream>
#include <map>
#include <random>
int main()
{
std::random_device rd;
std::mt19937 gen(rd());
std::discrete_distribution<> d({40, 10, 10, 40});
std::map<int, int> m;
for(int n=0; n<10000; ++n) {
++m[d(gen)];
}
for(auto p : m) {
std::cout << p.first << " generated " << p.second << " times\n";
}
}
Rsultat :
0 generated 4028 times
1 generated 978 times
2 generated 1012 times
3 generated 3982 times