std::generate — cppreference.com

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Déclaré dans l'en-tête `<algorithm>`
`template< class ForwardIt, class Generator > void generate( ForwardIt first, ForwardIt last, Generator g );`

Attribue à chaque élément dans la plage [first, last) une valeur générée par l'objet de fonction donnée g .

Original:

Assigns each element in range [first, last) a value generated by the given function object g.

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Paramètres

first, last	-	l'ensemble d'éléments à générer Original: the range of elements to generate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
g	-	generator function object that will be called. The signature of the function should be equivalent to the following: <tbody> </tbody> The type `Ret` must be such that an object of type `ForwardIt` can be dereferenced and assigned a value of type `Ret`.
Type requirements
-`ForwardIt` must meet the requirements of `ForwardIterator`.

Retourne la valeur

(Aucun)

Original:

(none)

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Complexité

Exactement std::distance(first, last) invocations de g() et les affectations .

Original:

Exactly std::distance(first, last) invocations of g() and assignments.

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Mise en œuvre possible

template<class ForwardIt, class Generator>
void generate(ForwardIt first, ForwardIt last, Generator g)
{
    while (first != last) {
        *first++ = g();
    }
}

Exemple

Les usages code suivant remplit un vecteur de nombres aléatoires:

Original:

The following code uses fills a vector with random numbers:

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#include <algorithm>
#include <iostream>
#include <cstdlib>
 
int main()
{
    std::vector<int> v(5);
    std::generate(v.begin(), v.end(), std::rand); // Using the C function rand()
 
    std::cout << "v: ";
    for (auto iv: v) {
        std::cout << iv << " ";
    }
    std::cout << "\n";
}

Résultat :

v: 52894 15984720 41513563 41346135 51451456

Voir aussi


	attribue un ensemble d'éléments d'une certaine valeur Original: assigns a range of elements a certain value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]

	enregistre le résultat de l'application de N d'une fonction Original: saves the result of N applications of a function The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]