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std::reverse

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
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Functions
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Não modificar operações de seqüência
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Non-modifying sequence operations
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Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
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Partitioning operations
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Operações de classificação (em intervalos ordenados)
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Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
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Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <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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Índice

[editar] Parâmetros

first, last -
o intervalo de elementos de reverter
Original:
the range of elements to reverse
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Type requirements
-
BidirIt must meet the requirements of BidirectionalIterator.
-
The type of dereferenced BidirIt must meet the requirements of Swappable.

[editar] Valor de retorno

(Nenhum)
Original:
(none)
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[editar] Possível implementação

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

[editar] 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';
}

Output:

321
7654

[editar] Complexidade

linear, em que a distância entre first e last
Original:
linear in the distance between first and last
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[editar] Veja também

cria uma cópia de um intervalo que é invertida
Original:
creates a copy of a range that is reversed
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(modelo de função) [edit]