std::includes
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Defined in header <algorithm> | ||
template<class InputIt1, class InputIt2 > bool includes( InputIt1 first1, InputIt1 last1, | (1) | |
template<class InputIt1, class InputIt2 > bool includes( InputIt1 first1, InputIt1 last1, | (2) | |
Retorna true se cada elemento da
[first2, last2) intervalo classificado é encontrado dentro do [first, last) intervalo classificado. Também retorna true se [first2, last2) está vazia. Original:
Returns true if every element from the sorted range
[first2, last2) is found within the sorted range [first, last). Also returns true if [first2, last2) is empty. The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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A primeira versão espera que ambas as faixas a serem classificados com operator<, a segunda versão espera que sejam classificados com a função de comparação dada
comp.Original:
The first version expects both ranges to be sorted with operator<, the second version expects them to be sorted with the given comparison function
comp.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Índice |
[editar]Parâmetros
| first1, last1 | - | a faixa classificada de elementos para examinar Original: the sorted 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. |
| first2, last2 | - | a faixa classificada de elementos para pesquisar Original: the sorted range of 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. |
| 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. |
| Type requirements | ||
-InputIt must meet the requirements of InputIterator. | ||
[editar]Valor de retorno
true se cada elemento de
[first2, last2) é um membro da [first, last).Original:
true if every element from
[first2, last2) is a member of [first, last).The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[editar]Complexidade
Na maioria das comparações dos 2·(N1+N2-1), onde N1=std::distance(first1, last1) e N2=std::distance(first2, last2).
Original:
At most 2·(N1+N2-1) comparisons, where N1=std::distance(first1, last1) and N2=std::distance(first2, last2).
The text has been machine-translated via Google Translate.
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[editar]Possível implementação
| First version |
|---|
template<class InputIt1, class InputIt2>bool includes(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2){for(; first2 != last2;++first1){if(first1 == last1 ||*first2 <*first1)returnfalse;if(!(*first1 <*first2))++first2;}returntrue;} |
| Second version |
template<class InputIt1, class InputIt2>bool includes(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, Compare comp){for(; first2 != last2;++first1){if(first1 == last1 || comp(*first2, *first1))returnfalse;if(!comp(*first1, *first2))++first2;}returntrue;} |
[editar]Exemplo
#include <iostream>#include <algorithm>#include <cctype> int main(){std::vector<char> v1 {'a', 'b', 'c', 'f', 'h', 'x'};std::vector<char> v2 {'a', 'b', 'c'};std::vector<char> v3 {'a', 'c'};std::vector<char> v4 {'g'};std::vector<char> v5 {'a', 'c', 'g'};std::vector<char> v6; for(auto i : v1)std::cout<< i <<' ';std::cout<<"includes:\n"; for(auto i : v2)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v2.begin(), v2.end())<<'\n';for(auto i : v3)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v3.begin(), v3.end())<<'\n';for(auto i : v4)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v4.begin(), v4.end())<<'\n';for(auto i : v5)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v5.begin(), v5.end())<<'\n';for(auto i : v6)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v6.begin(), v6.end())<<'\n'; auto cmp_nocase =[](char a, char b){returnstd::tolower(a)<std::tolower(b);}std::vector<char> v7 {'A', 'B', 'C'};for(auto i : v7)std::cout<< i <<' ';std::cout<<": "<< std::includes(v1.begin(), v1.end(), v7.begin(), v7.end(), cmp_nocase)<<'\n';}
Output:
a b c f h x includes: a b c : 1 a c : 1 g : 0 a c g : 0 A B C : 1
[editar]Veja também
calcula a diferença entre os dois conjuntos Original: computes the difference between two sets 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) | |
| searches for a range of elements (modelo de função) | |
