std::merge

 

C++

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Conceitos

Biblioteca de utilitários

Biblioteca cordas

Recipientes biblioteca

Biblioteca algoritmos

Biblioteca iteradores

Biblioteca numéricos

De entrada / saída da biblioteca

Biblioteca localizações

Biblioteca de expressões regulares(C++11)

Biblioteca operações atômica(C++11)

Biblioteca de suporte a discussão(C++11)

 

Biblioteca algoritmo

Funções Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Não modificar operações de seqüência 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
Modificando operações de seqüência 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
Particionamento operações 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)
Operações de classificação (em intervalos ordenados) 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
Binários operações de busca (em intervalos ordenados) 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
Definir operações (em intervalos ordenados) 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
Operações de pilha 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
Mínimo / máximo de operações 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
Operações numéricas 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
C biblioteca 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

 

Defined in header <algorithm>
template<class InputIt1, class InputIt2, class OutputIt > OutputIt merge( InputIt1 first1, InputIt1 last1,                 InputIt2 first2, InputIt2 last2                 OutputIt d_first );	(1)
template<class InputIt1, class InputIt2, class OutputIt, class Compare> OutputIt merge( InputIt1 first1, InputIt1 last1,                 InputIt2 first2, InputIt2 last2                 OutputIt d_first, Compare comp );	(2)

Mescla duas faixas classificadas [first1, last1) e [first2, last2) em um intervalo classificado no início d_first. A primeira versão utiliza operator< para comparar os elementos, a segunda versão utiliza o comp dada função de comparação. A ordem relativa dos elementos equivalentes são preservados.

Original:

Merges two sorted ranges [first1, last1) and [first2, last2) into one sorted range beginning at d_first. The first version uses operator< to compare the elements, the second version uses the given comparison function comp. The relative order of equivalent elements is preserved.

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Parâmetros

first1, last1	-	a primeira gama de elementos para a fusão Original: the first range of elements to merge The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
first2, last2	-	a segunda faixa de elementos de fusões Original: the second range of elements to merge The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
d_first	-	o início do intervalo de destino Original: the beginning of the destination range 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 types Type1 and Type2 must be such that objects of types InputIt1 and InputIt2 can be dereferenced and then implicitly converted to Type1 and Type2 respectively. ​
Type requirements
- InputIt1 must meet the requirements of InputIterator.
- InputIt2 must meet the requirements of InputIterator.
- OutputIt must meet the requirements of OutputIterator.

Valor de retorno

Um iterador elemento de saída para além do último elemento copiado.

Original:

An output iterator to element past the last element copied.

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Complexidade

Na maioria das comparações dos std::distance(first1, last1)+std::distance(first2, last2)+1.

Original:

At most std::distance(first1, last1)+std::distance(first2, last2)+1 comparisons.

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Possível implementação

First version
template<class InputIt1, class InputIt2, class OutputIt> OutputIt merge(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first){for(; first1 != last1;++d_first){if(first2 == last2){returnstd::copy(first1, last1, d_first);}if(*first2 <*first1){*d_first =*first2;++first2;}else{*d_first =*first1;++first1;}}returnstd::copy(first2, last2, d_first);}
Second version
template<class InputIt1, class InputIt2, class OutputIt, class Compare> OutputIt merge(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, OutputIt d_first, Compare comp){for(; first1 != last1;++d_first){if(first2 == last2){returnstd::copy(first1, last1, d_first);}if(comp(*first2, *first1)){*d_first =*first2;++first2;}else{*d_first =*first1;++first1;}}returnstd::copy(first2, last2, d_first);}

Exemplo

#include <iostream>#include <iterator>#include <cstdlib>#include <algorithm>#include <vector>   int main(){conststd::size_t items =10;   std::vector<int> v1, v2, dst;   // fill the vectorsfor(std::size_t idx =0; idx < items;++idx){ v1.push_back(std::rand()%items); v2.push_back(std::rand()%items);}   // sortstd::sort(v1.begin(), v1.end());std::sort(v2.begin(), v2.end());   // output v1std::cout<<"v1 : ";std::copy(v1.begin(), v1.end(), std::ostream_iterator<int>(std::cout, " "));std::cout<<'\n';   // output v2std::cout<<"v2 : ";std::copy(v2.begin(), v2.end(), std::ostream_iterator<int>(std::cout, " "));std::cout<<'\n';   // merge std::merge(v1.begin(), v1.end(), v2.begin(), v2.end(), std::back_inserter(dst));   // outputstd::cout<<"dst: ";std::copy(dst.begin(), dst.end(), std::ostream_iterator<int>(std::cout, " "));std::cout<<'\n';}

Output:

v1 : 0 0 2 2 3 3 3 6 7 9 v2 : 1 2 5 5 6 6 6 6 7 9 dst: 0 0 1 2 2 2 3 3 3 5 5 6 6 6 6 6 7 7 9 9

Veja também

inplace_merge	funde duas faixas encomendadas no local Original: merges two ordered ranges in-place The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)
sort	tipo um intervalo em ordem crescente Original: sorts a range into ascending order The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)
stable_sort	Classifica um intervalo de elementos preservando ordem entre elementos iguais Original: sorts a range of elements while preserving order between equal elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)