std::is_sorted_until
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| definiert in Header <algorithm>
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| template< class ForwardIt > ForwardIt is_sorted_until( ForwardIt first, ForwardIt last ); |
(1) | (seit C++11) |
| template< class ForwardIt, class Compare > ForwardIt is_sorted_until( ForwardIt first, ForwardIt last, |
(2) | (seit C++11) |
Untersucht den Bereich
[first, last) und findet die größte Funktionsvielfalt Anfang an first in der die Elemente in aufsteigender Reihenfolge sortiert werden. Die erste Version der Funktion verwendet operator<, um die Elemente zu vergleichen, verwendet die zweite der angegebenen Vergleichsfunktion comp .Original:
Examines the range
[first, last) and finds the largest range beginning at first in which the elements are sorted in ascending order. The first version of the function uses operator< to compare the elements, the second uses the given comparison function comp.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
Inhaltsverzeichnis |
[Bearbeiten] Parameter
| first, last | - | das Spektrum der Elemente zu untersuchen
Original: the range of elements to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| comp | - | comparison function which returns true if the first argument is less than the second. The signature of the comparison function should be equivalent to the following: bool cmp(const Type1 &a, const Type2 &b); The signature does not need to have const &, but the function must not modify the objects passed to it. |
| Type requirements | ||
-ForwardIt must meet the requirements of ForwardIterator.
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[Bearbeiten] Rückgabewert
Der obere Bereich des größten beginnend bei
first in welcher die Elemente in aufsteigender Reihenfolge sortiert gebunden sind. Das heißt, die letzte Iterator it für die Palette [first, it) sortiert ist .Original:
The upper bound of the largest range beginning at
first in which the elements are sorted in ascending order. That is, the last iterator it for which range [first, it) is sorted.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[Bearbeiten] Komplexität
linear im Abstand
first und lastOriginal:
linear in the distance between
first and lastThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[Bearbeiten] Mögliche Implementierung
| First version |
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template<class ForwardIt> ForwardIt is_sorted_until(ForwardIt first, ForwardIt last) { if (first != last) { ForwardIt next = first; while (++next != last) { if (*next < *first) return next; first = next; } } return last; } |
| Second version |
template< class ForwardIt, class Compare > ForwardIt is_sorted_until(ForwardIt first, ForwardIt last, Compare comp) { if (first != last) { ForwardIt next = first; while (++next != last) { if (comp(*next, *first)) return next; first = next; } } return last; |
[Bearbeiten] Beispiel
#include <iostream> #include <algorithm> #include <iterator> #include <random> int main() { std::random_device rd; std::mt19937 g(rd()); const int N = 6; int nums[N] = {3, 1, 4, 1, 5, 9}; const int min_sorted_size = 4; int sorted_size = 0; do { std::random_shuffle(nums, nums + N, g); int *sorted_end = std::is_sorted_until(nums, nums + N); sorted_size = std::distance(nums, sorted_end); for (auto i : nums) std::cout << i << ' '; std::cout << " : " << sorted_size << " initial sorted elements\n"; } while (sorted_size < min_sorted_size); }
Possible output:
4 1 9 5 1 3 : 1 initial sorted elements 4 5 9 3 1 1 : 3 initial sorted elements 9 3 1 4 5 1 : 1 initial sorted elements 1 3 5 4 1 9 : 3 initial sorted elements 5 9 1 1 3 4 : 2 initial sorted elements 4 9 1 5 1 3 : 2 initial sorted elements 1 1 4 9 5 3 : 4 initial sorted elements
[Bearbeiten] Siehe auch
| (C++11) |
prüft, ob ein Bereich ist in aufsteigender Reihenfolge sortiert Original: checks whether a range is sorted into ascending order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) |
