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std::reverse_copy

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C++
 
Algorithm Bibliothek
Funktionen
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Functions
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Nicht-modifizierende Sequenz Operationen
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Non-modifying sequence operations
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Modifizierende Sequenz Operationen
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Modifying sequence operations
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Partitionierungsoperationen
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Partitioning operations
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Sortierung Operationen (auf sortierten Bereiche)
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Sorting operations (on sorted ranges)
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Binary Suchaktionen (auf sortierten Bereiche)
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Binary search operations (on sorted ranges)
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Set-Operationen (auf sortierten Bereiche)
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Set operations (on sorted ranges)
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Heap-Operationen
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Heap operations
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Minimum / Maximum Operationen
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Minimum/maximum operations
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Numerische Operationen
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Numeric operations
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C-Bibliothek
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C library
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definiert in Header <algorithm>
template< class BidirIt, class OutputIt >
OutputIt reverse_copy( BidirIt first, BidirIt last, OutputIt d_first );
Kopiert die Elemente aus dem Bereich [first, last), in einen anderen Bereich beginnend bei d_first in einer solchen Weise, dass die Elemente in der neuen Reihe sind in .. umgekehrter Reihenfolge .
Original:
Copies the elements from the range [first, last), to another range beginning at d_first in such a way, that the elements in the new range are in reverse order.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

first, last -
der Bereich der zu kopierenden Elemente
Original:
the range of elements to copy
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d_first -
der Beginn des Zielbereichs
Original:
the beginning of the destination range
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Type requirements
-
BidirIt must meet the requirements of BidirectionalIterator.
-
OutputIt must meet the requirements of OutputIterator.

[Bearbeiten] Rückgabewert

Output Iterator auf das Element nach dem letzten Element kopiert .
Original:
Output iterator to the element past the last element copied.
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[Bearbeiten] Mögliche Implementierung

template<class BidirIt, class OutputIt>
OutputIt reverse_copy(BidirIt first, BidirIt last, OutputIt d_first)
{
    while (first != last) {
        *(d_first++) = *(--last);
    }
    return d_first;
}

[Bearbeiten] Beispiel

#include <vector>
#include <iostream>
#include <algorithm>
 
int main()
{
    std::vector<int> v({1,2,3});
    std::for_each(std::begin(v), std::end(v),
                  [&](int value){ std::cout << value << " "; });
    std::cout << std::endl;
 
    std::vector<int> destiny(3);
    std::reverse_copy(std::begin(v), std::end(v), std::begin(destiny));
    std::for_each(std::begin(destiny), std::end(destiny),
                  [&](int value){ std::cout << value << " "; });
    std::cout << std::endl;
}

Output: 

1 2 3 
3 2 1

[Bearbeiten] Komplexität

linear im Abstand first und last
Original:
linear in the distance between first and last
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[Bearbeiten] Siehe auch
Kehrt die Reihenfolge Elemente in einem Bereich
Original:
reverses the order elements in a range
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(Funktions-Template) [edit]
Von „https://de.cppreference.com/mwiki/index.php?title=cpp/algorithm/reverse_copy&oldid=26110“