std::rotate
De cppreference.com
 | This page has been machine-translated from the English version of the wiki using Google Translate. The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
Déclaré dans l'en-tête <algorithm> | ||
template<class ForwardIt > void rotate( ForwardIt first, ForwardIt n_first, ForwardIt last ); | (avant C++11) (depuis C++11) | |
Echange les éléments dans la gamme
[first, last) de telle manière, que l'élément de n_first devient le premier élément de la nouvelle gamme n_first - 1 et devient le dernier élément . Original:
Swaps the elements in the range
[first, last) in such a way, that the element n_first becomes the first element of the new range and n_first - 1 becomes the last element. 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.
Sommaire |
[modifier]Paramètres
| first, last | - | l'ensemble d'éléments en rotation Original: the range of elements to rotate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| n_first | - | l'élément à déplacer vers le début de la nouvelle plage Original: the element to move to the beginning of the new range The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| Type requirements | ||
-ForwardIt must meet the requirements of ValueSwappable and ForwardIterator. | ||
-The type of dereferenced ForwardIt must meet the requirements of MoveAssignable and MoveConstructible. | ||
[modifier]Retourne la valeur
(Aucun) (avant C++11)
Original:
(none) (avant C++11)
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.
L'itérateur égale à
first + (last - n_first) (depuis C++11)Original:
The iterator equal to
first + (last - n_first) (depuis C++11)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.
[modifier]Complexité
linéaire de la distance entre
first et 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.
[modifier]Mise en œuvre possible
template<class ForwardIt>void rotate(ForwardIt first, ForwardIt n_first, ForwardIt last){ ForwardIt next = n_first;while(first != next){std::swap(*first++, *next++);if(next == last){ next = n_first;}elseif(first == n_first){ n_first = next;}}} |
[modifier]Exemple
std :: rotate est un élément commun à de nombreux algorithmes. Cet exemple illustre le tri par insertion en C + +
Original:
std::rotate is a common building block in many algorithms. This example demonstrates insertion sort in C++
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.
#include <vector>#include <iostream>#include <algorithm> int main(){std::vector<int> v{2, 4, 2, 0, 5, 10, 7, 3, 7, 1}; std::cout<<"before sort: ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n'; // insertion sortfor(auto i = v.begin(); i != v.end();++i){ std::rotate(std::upper_bound(v.begin(), i, *i), i, i+1);} std::cout<<"after sort: ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n'; // simple rotation to the left std::rotate(v.begin(), v.begin()+1, v.end()); std::cout<<"simple rotate left : ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n'; // simple rotation to the right std::rotate(v.rbegin(), v.rbegin()+1, v.rend()); std::cout<<"simple rotate right : ";for(int n: v)std::cout<< n <<' ';std::cout<<'\n'; }
Résultat :
before sort: 2 4 2 0 5 10 7 3 7 1 after sort: 0 1 2 2 3 4 5 7 7 10 simple rotate left : 1 2 2 3 4 5 7 7 10 0 simple rotate right: 0 1 2 2 3 4 5 7 7 10
[modifier]Voir aussi
les copies et les faire pivoter une gamme d'éléments Original: copies and rotate a range of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) | |
