std::search_n

 

C++

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Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

Algoritmo libreria

Funzioni 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 modifica le operazioni di sequenza 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
Modifica delle operazioni di sequenza 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
Partizionamento operazioni 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)
Ordinamento delle operazioni (su intervalli ordinati) 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
Binarie (le operazioni di ricerca sui campi ordinati) 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
Impostare le operazioni (su intervalli ordinati) 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
Heap operazioni 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
Minimo / massimo le operazioni 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
Operazioni numeriche 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
Libreria 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

 

Elemento definito nell'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)

Ricerche la [first, last) gamma per la prima sequenza di conteggio elementi identici, ciascuno pari al valore determinato valore. La prima versione utilizza operator== di confrontare gli elementi, la seconda versione utilizza il predicato binario dato 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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Parametri

first, last	-	la gamma di elementi da esaminare 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 lunghezza della sequenza di ricerca 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	-	il valore degli elementi da ricercare 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.

Valore di ritorno

Iiterator all'inizio della sequenza trovato [first, last) gamma. In assenza di tale sequenza viene trovato, viene restituito last.

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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Complessità

Alla maggior parte delle applicazioni last - first del predicato.

Original:

At most last - first applications of the predicate.

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Possibile implementazione

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;}

Vedi anche

find_end	trova l'ultima sequenza di elementi di un certo intervallo 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. (funzione di modello)
find find_if find_if_not (C++11)	trova il primo elemento che soddisfi i criteri specifici 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. (funzione di modello)
search	searches for a range of elements (funzione di modello)