std::partial_sort_copy
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<metanoindex/>
<tbody> </tbody>| definiert in Header <algorithm>
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template< class InputIt, class RandomIt > RandomIt partial_sort_copy( InputIt first, InputIt last, RandomIt d_first, RandomIt d_last ); |
(1) | |
template< class InputIt, class RandomIt, class Compare > RandomIt partial_sort_copy( InputIt first, InputIt last, RandomIt d_first, RandomIt d_last, Compare comp ); |
(2) | |
Arten einige der Elemente in dem Bereich
[first, last) in aufsteigender Reihenfolge. An den meisten d_first - d_last der Elemente werden auf den Bereich [d_first, d_first + n) bewegt und dann sortiert. n ist die Anzahl der Elemente zu sortieren (n = min(last - first, d_last - d_first)). Die Reihenfolge der gleiche Elemente ist nicht garantiert, bewahrt werden. Die erste Version verwendet operator< um die Elemente zu vergleichen, verwendet die zweite Version des gegebenen Vergleichsfunktion comp .Original:
Sorts some of the elements in the range
[first, last) in ascending order. At most d_first - d_last of the elements are moved to the range [d_first, d_first + n) and then sorted. n is the number of elements to sort (n = min(last - first, d_last - d_first)). The order of equal elements is not guaranteed to be preserved. The first version uses operator< to compare the elements, the second version 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.
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Parameter
| first, last | - | der Bereich von Elementen zu sortieren
Original: the range of elements to sort The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| d_first, d_last | - | Random-Access-Iteratoren definiert den Zielbereich
Original: random access iterators defining the destination range 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:
The signature does not need to have |
| Type requirements | ||
-InputIt must meet the requirements of InputIterator.
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-RandomIt must meet the requirements of ValueSwappable and RandomAccessIterator.
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-The type of dereferenced RandomIt must meet the requirements of MoveAssignable and MoveConstructible.
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Rückgabewert
ein Iterator zum Element definiert die obere Grenze des sortierten Bereich, also
d_first + min(last - first, d_last - d_first) .Original:
an iterator to the element defining the upper boundary of the sorted range, i.e.
d_first + min(last - first, d_last - d_first).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Komplexität
O(N·log(min(D,N)), wo
N = std::distance(first, last), D = std::distance(d_first, d_last) Anwendungen cmp .Original:
O(N·log(min(D,N)), where
N = std::distance(first, last), D = std::distance(d_first, d_last) applications of cmp.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.
Beispiel
Der folgende Code sortiert ein Vektor von ganzen Zahlen und kopiert sie in eine kleinere und eine größere vector .
Original:
The following code sorts an vector of integers and copies them into a smaller and a larger vector.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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#include <algorithm>
#include <vector>
#include <functional>
#include <iostream>
int main()
{
std::vector<int> v0{4, 2, 5, 1, 3};
std::vector<int> v1{10, 11, 12};
std::vector<int> v2{10, 11, 12, 13, 14, 15, 16};
std::vector<int>::iterator it;
it = std::partial_sort_copy(v0.begin(), v0.end(), v1.begin(), v1.end());
std::cout << "Writing to the smaller vector in ascending order gives: ";
for (int a : v1) {
std::cout << a << " ";
}
std::cout << '\n';
if(it == v1.end())
std::cout << "The return value is the end iterator\n";
it = std::partial_sort_copy(v0.begin(), v0.end(), v2.begin(), v2.end(),
std::greater<int>());
std::cout << "Writing to the larger vector in descending order gives: ";
for (int a : v2) {
std::cout << a << " ";
}
std::cout << '\n' << "The return value is the iterator to " << *it << '\n';
}
Output:
Writing to the smaller vector in ascending order gives: 1 2 3
The return value is the end iterator
Writing to the larger vector in descending order gives: 5 4 3 2 1 15 16
The return value is the iterator to 15
Siehe auch
sortiert die ersten N Elementen einer Palette Original: sorts the first N elements of a range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) | |
Sortiert einen Bereich in aufsteigender Reihenfolge Original: sorts a range 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) | |
Arten eine Reihe von Elementen, während Aufrechterhaltung der Ordnung zwischen gleichen Elementen Original: sorts a range of elements while preserving order between equal elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) | |