std::upper_bound

 

C++

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Bibliothèque d'utilitaires

Bibliothèque pour les chaînes de caractères

Bibliothèque de conteneurs

Bibliothèque d'algorithmes

Bibliothèque d'itérateurs

Bibliothèque pour le calcul numérique

Bibliothèque pour les entrées/sorties

Bibliothèque pour la régionalisation

Bibliothèque pour les expressions régulières (C++11)

Bibliothèque pour les opérations atomiques (C++11)

Bibliothèque pour les processus légers (threads) (C++11)

 

Bibliothèque d'algorithmes

Fonctions Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Non-modification de la séquence des opérations Original: Non-modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
all_of any_of none_of (C++11) (C++11) (C++11) for_each count count_if mismatch equal	find find_if find_if_not (C++11) find_end find_first_of adjacent_find search search_n
Modification de la séquence des opérations Original: Modifying sequence operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
copy copy_if (C++11) copy_n (C++11) copy_backward move (C++11) move_backward (C++11) fill fill_n transform generate generate_n remove remove_if remove_copy remove_copy_if	replace replace_if replace_copy replace_copy_if swap swap_ranges iter_swap reverse reverse_copy rotate rotate_copy random_shuffle shuffle   (C++11) unique unique_copy
Des opérations de partitionnement Original: Partitioning operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_partitioned (C++11) partition partition_copy (C++11)	stable_partition partition_point (C++11)
Opérations de tri (sur les gammes triés) Original: Sorting operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_sorted (C++11) is_sorted_until (C++11) sort	partial_sort partial_sort_copy stable_sort nth_element
Opérations binaires de recherche (sur les gammes triés) Original: Binary search operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
lower_bound upper_bound	binary_search equal_range
Définir les opérations (sur les gammes triés) Original: Set operations (on sorted ranges) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
merge inplace_merge includes	set_difference set_intersection set_symmetric_difference set_union
Opérations Heap Original: Heap operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
is_heap is_heap_until (C++11) make_heap	push_heap pop_heap sort_heap
Minimum / maximum de fonctionnement Original: Minimum/maximum operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
max max_element min min_element minmax (C++11) minmax_element (C++11)	lexicographical_compare is_permutation (C++11) next_permutation prev_permutation
Opérations numériques Original: Numeric operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
iota (C++11) accumulate inner_product	adjacent_difference partial_sum
Bibliothèque C Original: C library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
qsort	bsearch

 

Déclaré dans l'en-tête <algorithm>
template<class ForwardIt, class T > ForwardIt upper_bound( ForwardIt first, ForwardIt last, const T& value );	(1)
template<class ForwardIt, class T, class Compare > ForwardIt upper_bound( ForwardIt first, ForwardIt last, const T& value, Compare comp );	(2)

Retourne un itérateur pointant sur le premier élément de la [first, last) plage qui est plus que value. La première version utilise operator< de comparer les éléments, la deuxième version utilise la fonction de comparaison donnée comp .

Original:

Returns an iterator pointing to the first element in the range [first, last) that is greater than value. The first version uses operator< to compare the elements, the second version uses the given comparison function comp.

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Paramètres

first, last	-	l'éventail des éléments à examiner 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.
value	-	valeur à comparer les éléments d' Original: value to compare the elements to 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. The type Type1 must be such that an object of type T can be implicitly converted to Type1. The type Type2 must be such that an object of type ForwardIt can be dereferenced and then implicitly converted to Type2. ​
Type requirements
- ForwardIt must meet the requirements of ForwardIterator.

Retourne la valeur

itérateur pointant sur le premier élément qui est plus que value ou last si aucun élément correspondant n'est trouvé .

Original:

iterator pointing to the first element that is greater than value, or last if no such element is found.

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Mise en œuvre possible

First version
template<class ForwardIt, class T> ForwardIt upper_bound(ForwardIt first, ForwardIt last, const T& value){ ForwardIt it;std::iterator_traits<ForwardIt>::distance_type count, step; count =std::distance(first,last);   while(count >0){ it = first; step = count /2;std::advance(it, step);if(!(value <*it)){ first =++it; count -= step +1;}else count = step;}return first;}
Second version
template<class ForwardIt, class T, class Compare> ForwardIt upper_bound(ForwardIt first, ForwardIt last, const T& value, Compare comp){ ForwardIt it;std::iterator_traits<ForwardIt>::distance_type count, step; count =std::distance(first,last);   while(count >0){ it = first; step = count /2;std::advance(it, step);if(!comp(value, *it)), first =++it; count -= step +1}else count = step;}return first;}

Exemple

#include <algorithm>#include <iostream>#include <iterator>#include <vector>   int main(){std::vector<int> data ={1, 1, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6};   auto lower =std::lower_bound(data.begin(), data.end(), 4);auto upper = std::upper_bound(data.begin(), data.end(), 4);   std::copy(lower, upper, std::ostream_iterator<int>(std::cout, " "));}

Résultat :

4 4 4

Complexité

logarithmique de la distance entre first et last

Original:

logarithmic in the distance between first and last

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Voir aussi

equal_range	rendements varient d'éléments correspondant à une clé spécifique Original: returns range of elements matching a specific key The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)
lower_bound	retourne un itérateur sur le premier élément' pas moins que la valeur donnée Original: returns an iterator to the first element not less than the given value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique)