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    std::search_n

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    <metanoindex/>

     
    C++
     
    Bibliothèque d'algorithmes
    Fonctions
    Original:
    Functions
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    Non-modification de la séquence des opérations
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    Non-modifying sequence operations
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    Modification de la séquence des opérations
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    Modifying sequence operations
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    Des opérations de partitionnement
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    Partitioning operations
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    Opérations de tri (sur les gammes triés)
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    Sorting operations (on sorted ranges)
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    is_sorted (C++11)
    is_sorted_until (C++11)
    sort
    Opérations binaires de recherche (sur les gammes triés)
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    Binary search operations (on sorted ranges)
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    Définir les opérations (sur les gammes triés)
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    Set operations (on sorted ranges)
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    Opérations Heap
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    Heap operations
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    Minimum / maximum de fonctionnement
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    Minimum/maximum operations
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    Opérations numériques
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    Numeric operations
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    Bibliothèque C
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    C library
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    <tbody> </tbody>
    Déclaré dans l'en-tête <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.
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    Paramètres

    first, last -
    l'éventail des éléments à examiner
    Original:
    the range of elements to examine
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    count -
    la longueur de la séquence à rechercher
    Original:
    the length of the sequence to search for
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    value -
    la valeur des éléments à rechercher
    Original:
    the value of the elements to search for
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    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.

    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.
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    Complexité

    À la plupart des applications last - first du prédicat .
    Original:
    At most last - first applications of the predicate.
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    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;
}

    Exemple

    This section is incomplete

    Voir aussi
    trouve la dernière séquence d'éléments dans une certaine plage
    Original:
    finds the last sequence of elements in a certain range
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    (fonction générique) [edit]


    (C++11)
    trouve le premier élément répondant à des critères spécifiques
    Original:
    finds the first element satisfying specific criteria
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    (fonction générique) [edit]
    recherches pour une série d'éléments
    Original:
    searches for a range of elements
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    (fonction générique) [edit]