std::basic_ios::bad
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<metanoindex/>
<tbody> </tbody> bool bad() const; |
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Retorna
true se não recuperável Erro no fluxo associado. Especificamente, os retornos true se badbit é definido em rdstate().Original:
Returns
true if non-recoverable error has occurred on the associated stream. Specifically, returns true if badbit is set in rdstate().The text has been machine-translated via Google Translate.
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A biblioteca padrão define badbit nas seguintes situações:
Original:
The standard library sets badbit in the following situations:
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- Inserção no fluxo de saída por colocar () ou write () falhar por qualquer motivo.Original:Insertion into the output stream by put() or write() fails for any reason.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Inserção no fluxo de saída por operador. <<, std::put_money ou std::put_time, não foi possível concluir, porque o final do fluxo de saída foi alcançado (função A faceta de saída de formatação como num_put::put() ou money_put::put(), devolve uma iteração tal que
iteriter.failed()==true)Original:Insertion into the output stream by operador. <<, std::put_money or std::put_time, could not complete because the end of the output stream was reached (The facet's formatting output function such as num_put::put() or money_put::put(), returns an iteratoritersuch thatiter.failed()==true)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Fluxo é construído com um ponteiro nulo para rdbuf (), ou putback () / unget () é chamado em um riacho com um rdbuf nula (), ou um ponteiro nulo passado para operador << (* basic_streambuf)Original:Stream is constructed with a null pointer for rdbuf(), or putback()/unget() is called on a stream with a null rdbuf(), or a null pointer passed to operator<<(basic_streambuf*)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - rdbuf () -> sputbackc () ou rdbuf () - Retorna> sungetc () traços :: EOF () para putback () ou unget ()Original:rdbuf()->sputbackc() or rdbuf()->sungetc() return traits::eof() to putback() or unget()The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - rdbuf () -> pubsync () retorna
-1para sincronizar (), para flush (), ou o destruidor de ostream :: sentinela em um córrego unitbufOriginal:rdbuf()->pubsync() returns-1to sync(), to flush(), or to the destructor of ostream::sentry on a unitbuf streamThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Exceção é lançada durante uma operação de I / O por qualquer função de membro do buffer de fluxo associado (por exemplo sbumpc (), xsputn (), sgetc (), overflow (), etc.)Original:Exception is thrown during an I/O operation by any member function of the associated stream buffer (e.g. sbumpc(), xsputn(), sgetc(), overflow(), etc)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Exceção é lançada em iword () ou pword () (por exemplo, std :: bad_alloc)Original:Exception is thrown in iword() or pword() (e.g. std::bad_alloc)The text has been machine-translated via Google Translate.
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Parâmetros
(Nenhum)
Original:
(none)
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Valor de retorno
true se um erro não-recuperável ocorreu, false outra forma.Original:
true if a non-recoverable error has occurred, false otherwise.The text has been machine-translated via Google Translate.
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Exemplo
#include <iostream>
#include <fstream>
#include <cstdlib>
int main()
{
std::ifstream file("test.txt");
if(!file) // operator! is used here
{
std::cout << "File opening failed\n";
return EXIT_FAILURE;
}
// typical C++ I/O loop uses the return value of the I/O function
// as the loop controlling condition, operator bool() is used here
for(int n; file >> n; ) {
std::cout << n << ' ';
}
std::cout << '\n';
if (file.bad())
std::cout << "I/O error while reading\n";
else if (file.eof())
std::cout << "End of file reached successfully\n";
else if (file.fail())
std::cout << "Non-integer data encountered\n";
}