std::basic_filebuf::is_open
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< cpp | io | basic filebuf
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| bool is_open() const; |
||
Retorna true se a chamada mais recente para
open() sucesso e não houve nenhuma chamada para close() desde então.Original:
Returns true if the most recent call to
open() succeeded and there has been no call to close() since then.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
(Nenhum)
Original:
(none)
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[editar] Valor de retorno
true se o arquivo associado é aberto, caso contrário false.
Original:
true if the associated file is open, false otherwise.
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] Notas
Esta função é geralmente chamado por std::basic_fstream::is_open.
Original:
This function is typically called by std::basic_fstream::is_open.
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[editar] Exemplo
#include <fstream> #include <iostream> int main() { std::ifstream fs("test.txt"); std::filebuf fb; fb.open("test.txt", std::ios_base::in); std::cout << std::boolalpha << "direct call: " << fb.is_open() << '\n' << "through streambuf: " << fs.rdbuf()->is_open() << '\n' << "through fstream: " << fs.is_open() << '\n'; }
Saída:
direct call: true through streambuf: true through fstream: true
[editar] Veja também
| abre um arquivo e configura como a seqüência de caracteres associado Original: opens a file and configures it as the associated character sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
| esvaziará o buffer área e colocar fecha o arquivo associado Original: flushes the put area buffer and closes the associated file The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (função pública membro) | |
