std::reverse - cppreference.com

De cppreference.com

Definido no cabeçalho `<algorithm>`

`template< class BidirIt > void reverse( BidirIt first, BidirIt last );`

Inverte a ordem dos elementos no [first, last) gama.

Original:

Reverses the order of the elements in the range [first, last).

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Parâmetros

first, last	-	o intervalo de elementos de reverter Original: the range of elements to reverse The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Type requirements
-`BidirIt` must meet the requirements of `BidirectionalIterator`.
-The type of dereferenced `BidirIt` must meet the requirements of `Swappable`.

Valor de retorno

(Nenhum)

Original:

(none)

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Possível implementação

template<class BidirIt>
void reverse(BidirIt first, BidirIt last)
{
    while ((first != last) && (first != --last)) {
        std::swap(*first++, *last);
    }
}

Exemplo

#include <vector>
#include <iostream>
#include <algorithm>
 
int main(int argc, char** argv)
{
    std::vector<int> v({1,2,3});
    std::reverse(std::begin(v), std::end(v));
    std::cout << v[0] << v[1] << v[2] << '\n';

    int a[] = {4, 5, 6, 7};
    std::reverse(&a[0], &a[4]);
    std::cout << a[0] << a[1] << a[2] << a[3] << '\n';
}

Saída:

Complexidade

linear, em que a distância entre first e last

Original:

linear in the distance between first and last

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Veja também


	cria uma cópia de um intervalo que é invertida Original: creates a copy of a range that is reversed 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]