std::basic_ios::bad
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| bool bad() const; |
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Возврат true если неустранимая ошибка произошла на соответствующий поток. В частности, возвращается true если
badbit расположен в 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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В стандартной библиотеке устанавливает badbit в следующих ситуациях:
Original:
The standard library sets badbit in the following situations:
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- Вставка в выходной поток на положить () или написать () терпит неудачу по любой причине.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. - Вставка в выходной поток по Оператор <<, std::put_money или std::put_time, не смог завершить, потому что конец выходного потока была достигнута (форматирование аспект в выходной функции, такие как num_put::put() или money_put::put(), возвращает итератор
iter, что iter.failed()==true)Original:Insertion into the output stream by Оператор <<, 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 that iter.failed()==true)The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions. - Поток построена с нулевым указателем для rdbuf (), или Putback () / уничтожать в зародыше () вызывается в потоке с нулевым rdbuf (), или нулевой указатель передается оператору << (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 () или rdbuf () -> sungetc () возвращают черты :: EOF (), чтобы Putback () или уничтожать в зародыше ()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 () возвращает -1 для синхронизации (), чтобы смыть (), или деструктор озЬгеат :: часового на unitbuf потокOriginal:rdbuf()->pubsync() returns -1 to 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. - Исключение во время операции ввода / вывода любого члена функции соответствующего буфера потока (например, sbumpc (), xsputn (), sgetc (), переполнение (), и т.д.)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. - Исключение в iword () или Pword () (например, 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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Содержание |
[править] Параметры
(Нет)
Original:
(none)
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[править] Возвращаемое значение
true если неустранимая ошибка, false иначе.
Original:
true if a non-recoverable error has occurred, false otherwise.
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[править] Пример
#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"; }
[править] См. также
| ios_base::iostate flags | basic_ios accessors | |||||||
| eofbit | failbit | badbit | good() | fail() | bad() | eof() | operator bool() | operator!() |
| false | false | false | true | false | false | false | true | false |
| false | false | true | false | true | true | false | false | true |
| false | true | false | false | true | false | false | false | true |
| false | true | true | false | true | true | false | false | true |
| true | false | false | false | false | false | true | true | false |
| true | false | true | false | true | true | true | false | true |
| true | true | false | false | true | false | true | false | true |
| true | true | true | false | true | true | true | false | true |