std::generate - cppreference.com

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Definido no cabeçalho `<algorithm>`

`template< class ForwardIt, class Generator > void generate( ForwardIt first, ForwardIt last, Generator g );`

Atribui a cada elemento na faixa [first, last) um valor gerado pelo objeto função dada g.

Original:

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

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Parâmetros

first, last	-	a gama de elementos para gerar 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`.

Valor de retorno

(Nenhum)

Original:

(none)

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Complexidade

Exatamente std::distance(first, last) invocações de g() e atribuições.

Original:

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

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Possível implementação

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

Exemplo

Os usos de código a seguir preenche um vetor com números aleatórios:

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";
}

Saída:

v: 52894 15984720 41513563 41346135 51451456

Veja também


	atribui um intervalo de elementos de um certo valor 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. (modelo de função) [edit]

	guarda o resultado de aplicações de N de uma função 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. (modelo de função) [edit]