Espaces de noms
Variantes
Affichages
Actions

std::search_n

De cppreference.com
< cpp‎ | algorithm

 
 
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.
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.
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.
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
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.
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.
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.
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.
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.
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.
 
Defined in header <algorithm>
template< class ForwardIt, class Size, class T >
ForwardIt1 search_n( ForwardIt first, ForwardIt last, Size count, const T& value );
(1)
template< class ForwardIt, class Size, class T, class BinaryPredicate >

ForwardIt1 search_n( ForwardIt first, ForwardIt last, Size count, const T& value,

                     BinaryPredicate p );
(2)
Recherches [first, last) la plage pour la première séquence de comptage des éléments identiques, chacune égale à la valeur valeur donnée. La première version utilise operator== de comparer les éléments, la deuxième version utilise le prédicat binaire donné p .
Original:
Searches the range [first, last) for the first sequence of count identical elements, each equal to the given value value. The first version uses operator== to compare the elements, the second version uses the given binary predicate p.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Sommaire

[modifier] 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.
count -
la longueur de la séquence à rechercher
Original:
the length of the sequence to search for
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
value -
la valeur des éléments à rechercher
Original:
the value of the elements to search for
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
p - binary predicate which returns ​true if the elements should be treated as equal.

The signature of the predicate function should be equivalent to the following:

 bool pred(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 ForwardIt can be dereferenced and then implicitly converted to  Type1. The type  Type2 must be such that an object of type T can be implicitly converted to  Type2.

Type requirements
-
ForwardIt must meet the requirements of ForwardIterator.

[modifier] Retourne la valeur

Iiterator au début de la séquence trouvée dans la gamme [first, last). Si aucune séquence n'est trouvée, last est retourné .
Original:
Iiterator to the beginning of the found sequence in the range [first, last). If no such sequence is found, last is returned.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifier] Complexité

À la plupart des applications last - first du prédicat .
Original:
At most last - first applications of the predicate.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifier] Mise en œuvre possible

First version
template<class ForwardIt, class Size, class T>
ForwardIt1 search_n(ForwardIt first, ForwardIt last,
                          Size count, const T& value)
{
    Size curr_count = 0;
    ForwardIt result, t_last = first;
    std::advance(t_last, std::distance(first, last) - count + 1);
 
    for (; first != t_last; first++) {
        curr_count = 0;
        result = first;
        while (*first == value) {
            curr_count++;
            if (curr_count == count) {
                return result;
            }
            ++first;
        }
    }
    return last;
}
Second version
template<class ForwardIt, class Size, class T, class BinaryPredicate>
ForwardIt1 search_n(ForwardIt first, ForwardIt last,
                          Size count, const T& value, BinaryPredicate p)
{
    Size curr_count = 0;
    ForwardIt result, t_last = first;
    std::advance(t_last, std::distance(first, last) - count + 1);
 
    for (; first != t_last; first++) {
        curr_count = 0;
        result = first;
        while (p(*first == value)) {
            curr_count++;
            if (curr_count == count) {
                return result;
            }
            ++first;
        }
    }
    return last;
}

[modifier] Exemple

[modifier] Voir aussi

trouve la dernière séquence d'éléments dans une certaine plage
Original:
finds the last sequence of elements in a certain range
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction générique) [edit]
trouve le premier élément répondant à des critères spécifiques
Original:
finds the first element satisfying specific criteria
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction générique) [edit]
recherches pour une série d'éléments
Original:
searches for 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) [edit]