std::min_element
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Definido no cabeçalho <algorithm> | ||
template<class ForwardIt > ForwardIt min_element( ForwardIt first, ForwardIt last ); | (1) | |
template<class ForwardIt, class Compare > ForwardIt min_element( ForwardIt first, ForwardIt last, Compare comp ); | (2) | |
Encontra o menor elemento no
[first, last) alcance. A primeira versão utiliza operator< para comparar os valores, a segunda versão utiliza a função de comparação dada comp.Original:
Finds the smallest element in the range
[first, last). The first version uses operator< to compare the values, the second version uses 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.
You can help to correct and verify the translation. Click here for instructions.
Índice |
[editar]Parâmetros
| first, last | - | iteradores para a frente que definem o intervalo para examinar Original: forward iterators defining the range to examine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
| cmp | - | comparison function which returns true if if *a is less than *b. 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 | ||
-ForwardIt must meet the requirements of ForwardIterator. | ||
[editar]Valor de retorno
Iterador para o elemento mais pequeno da gama
[first, last). Se vários elementos da gama são equivalentes ao elemento mais pequeno, retorna o iterador para o primeiro elemento desse tipo. Retorna last se o intervalo é vazio.Original:
Iterator to the smallest element in the range
[first, last). If several elements in the range are equivalent to the smallest element, returns the iterator to the first such element. Returns last if the range is empty.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
Exactamente max(N-1,0) comparações, onde N =std::distance(first, last).
Original:
Exactly max(N-1,0) comparisons, where N =std::distance(first, last).
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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[editar]Possível implementação
| First version |
|---|
template<class ForwardIt> ForwardIt min_element(ForwardIt first, ForwardIt last){if(first == last)return last; ForwardIt smallest = first;++first;for(; first != last;++first){if(*first <*smallest){ smallest = first;}}return smallest;} |
| Second version |
template<class ForwardIt, class Compare> ForwardIt min_element(ForwardIt first, ForwardIt last, Compare comp){if(first == last)return last; ForwardIt smallest = first;++first;for(; first != last;++first){if(comp(*first, *smallest)){ smallest = first;}}return smallest;} |
[editar]Exemplo
#include <algorithm>#include <iostream>#include <vector> int main(){std::vector<int> v{3, 1, 4, 1, 5, 9}; std::vector<int>::iterator result = std::min_element(v.begin(), v.end());std::cout<<"min element at: "<<std::distance(v.begin(), result);}
Saída:
min element at: 1
[editar]Veja também
retorna o maior elemento de um intervalo Original: returns the largest element in a range 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) | |
(C++11) | retorna o elemento menor e maior em um intervalo Original: returns the smallest and the largest element in a range 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) |
retorna o menor dos dois elementos Original: returns the smaller of two 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) | |
