std::distance - cppreference.com
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| Definido no cabeçalho <iterator> |
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Retorna o número de elementos entre first e last.
Original:
Returns the number of elements between first and last.
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O comportamento é indefinido se last não é acessível a partir de first por (possivelmente repetidamente) incrementando first.
Original:
The behavior is undefined if last is not reachable from first by (possibly repeatedly) incrementing first.
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Parâmetros
| first | - | iterador apontando para o primeiro elemento Original: iterator pointing to the first element The text has been machine-translated via Google Translate. |
| last | - | iterador apontando para o último elemento Original: iterator pointing to the last element The text has been machine-translated via Google Translate. |
| Type requirements | ||
-InputIt must meet the requirements of InputIterator. The operation is more efficient if InputIt additionally meets the requirements of RandomAccessIterator
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Valor de retorno
O número de elementos entre first e last.
Original:
The number of elements between first and last.
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Complexidade
Linear.
Original:
Linear.
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No entanto, se, adicionalmente, InputIt cumpre os requisitos da RandomAccessIterator, a complexidade é constante.
Original:
However, if InputIt additionally meets the requirements of RandomAccessIterator, complexity is constant.
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Exemplo
#include <iostream> #include <iterator> #include <vector> int main() { std::vector<int> v{ 3, 1, 4 }; auto distance = std::distance(v.begin(), v.end()); std::cout << distance << '\n'; }
Saída:
Veja também
avanços de um iterador por determinada distância Original: advances an iterator by given distance The text has been machine-translated via Google Translate. (função) [edit] | |