std::basic_ostream::operator<<

 

C++

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Ввод / вывод

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Регулярные выражения (C++11)

Атомарные примитивы (C++11)

Потоки (C++11)

 

Библиотеки ввода / вывода

I / O манипуляторов

C-стиль I / O

Буферы Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (устарело)

Потоки Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Абстракций Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

Файл I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

basic_ofstream

basic_fstream

Струнный I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istringstream

basic_ostringstream

basic_stringstream

Массив I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (устарело)

ostrstream (устарело)

strstream (устарело)

Типы Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

streamsize

fpos

Интерфейс Ошибка категории Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

std::basic_ostream

Глобальные объекты Original: Global objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
cout wcout	cerr wcerr	clog wclog
Член функций Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator= (C++11)
Форматированный ввод Original: Formatted input The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::operator<<
Неформатированная вход Original: Unformatted input The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::put
basic_ostream::write
Позиционирование Original: Positioning The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::tellp
basic_ostream::seekp
Разное Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::flush
basic_ostream::swap (C++11)
Член классов Original: Member classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
basic_ostream::sentry
Не являющиеся членами функций Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
operator<<(std::basic_ostream)

 

basic_ostream& operator<<( short value ); basic_ostream& operator<<( unsigned short value );	(1)
basic_ostream& operator<<( int value ); basic_ostream& operator<<( unsigned int value );	(2)
basic_ostream& operator<<( long value ); basic_ostream& operator<<( unsigned long value );	(3)
basic_ostream& operator<<( long long value ); basic_ostream& operator<<( unsigned long long value );	(4)	(начиная с C++11)
basic_ostream& operator<<( float value ); basic_ostream& operator<<( double value ); basic_ostream& operator<<( long double value );	(5)
basic_ostream& operator<<( bool value );	(6)
basic_ostream& operator<<( const void* value );	(7)
basic_ostream& operator<<( std::basic_streambuf<CharT, Traits>* sb);	(8)
basic_ostream& operator<<( basic_ostream& st,                            std::ios_base& (*func)(std::ios_base&) ); basic_ostream& operator<<( basic_ostream& st,                            std::basic_ios<CharT,Traits>& (*func)(std::basic_ios<CharT,Traits>&) ); basic_ostream& operator<<( basic_ostream& st,                            std::basic_ostream& (*func)(std::basic_ostream&) );	(9)

Вставка данных в поток.

Original:

Inserts data into the stream.

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(1-7) версии оператора ведут себя, как отформатированные функции вывода и 8) версия ведет себя как неформатированный выходной функции. Эти функции начинается выполнение путем построения объекта типа sentry, который очищает tie()'d выходные буферы при необходимости и проверяет поток ошибок. После завершения строительных работ, если часовой объект возвращается false, функции возвращают не пытаясь никаких выходных данных. Если ошибка появляется во время выходных, отформатированных выходных функций установлены setstate(ios_base::failbit). Если исключение во время выходных, то IOS :: badbit установлен (за исключением подавляется, если (exceptions()&badbit) != 0, в этом случае он выдается повторно)

Original:

The (1-7) versions of the operator behave as formatted output functions, and the 8) version behaves as unformatted output function. These functions begin execution by constructing an object of type sentry, which flushes the tie()'d output buffers if necessary and checks the stream errors. After construction, if the sentry object returns false, the functions return without attempting any output. If an error occurs during output, formatted output functions set setstate(ios_base::failbit). If an exception is thrown during output, then ios::badbit is set (the exception is suppressed unless (exceptions()&badbit) != 0, in which case it is rethrown)

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1-2)

Если value является short или int, затем бросает его в unsigned short или unsigned int если ios_base::flags() & ios_base::basefield является ios_base::oct или ios_base::hex. После этого бросает в long в любом случае и выходов, а в 3). Если value является unsigned short или unsigned int, бросает в unsigned long и выходов, а в 3)

Original:

If value is short or int, then casts it to unsigned short or unsigned int if ios_base::flags() & ios_base::basefield is ios_base::oct or ios_base::hex. After that, casts to long in any case and outputs as in 3). If value is unsigned short or unsigned int, casts to unsigned long and outputs as in 3)

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3-4)

Вставки целое значение, вызвав num_put::put(). Если конец файла условием была обнаружена во время выхода (put().failed() == true), устанавливает ios::badbit.

Original:

Inserts an integer value by calling num_put::put(). If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.

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5)

Вставляет значение с плавающей точкой, вызвав num_put::put() Если конец файла условием была обнаружена во время выхода (put().failed() == true), устанавливает ios::badbit.

Original:

Inserts a floating point value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.

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6)

Вставки bool значения по телефону num_put::put() Если конец файла условием была обнаружена во время выхода (put().failed() == true), устанавливает ios::badbit.

Original:

Inserts bool value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.

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7)

Вставляет общее значение указателя по телефону num_put::put() Если конец файла условием была обнаружена во время выхода (put().failed() == true), устанавливает ios::badbit.

Original:

Inserts a generic pointer value by calling num_put::put() If the end of file condition was encountered during output (put().failed() == true), sets ios::badbit.

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8)

Вставки все данные из sb. После построения часового объект, проверяет sb является нулевым указателем. Если это так, выполняет setstate(badbit) и выходы. В противном случае, извлекает символы из входной последовательности контролируется sb и вставляет их в *this до одного из следующих условий:

Original:

Inserts all data from sb. After constructing the sentry object, checks if sb is a null pointer. If it is, executes setstate(badbit) and exits. Otherwise, extracts characters from the input sequence controlled by sb and inserts them into *this until one of the following conditions are met:

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• конец файла происходит на входной последовательности;

  Original:

  end-of-file occurs on the input sequence;

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• вставка в выходной последовательности не удается (в этом случае символ, который будет вставлен не извлекается);

  Original:

  inserting in the output sequence fails (in which case the character to be inserted is not extracted);

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• происходит исключение (в этом случае исключение перехватывается).

  Original:

  an exception occurs (in which case the exception is caught).

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Если символы не были добавлены, выполняет setstate(badbit). Если исключение при добыче, устанавливает failbit

Original:

If no characters were inserted, executes setstate(badbit). If an exception was thrown while extracting, sets failbit

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9)

Звонки func(*this);. Эта перегрузка используется для реализации выхода I / O манипуляторы, такие как std::endl.

Original:

Calls func(*this);. This overload is used to implement output I/O manipulators such as std::endl.

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Параметры

value	-	целое, с плавающей точкой, логические, или значение указателя для вставки Original: integer, floating-point, boolean, or pointer value to insert The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
func	-	функции для вызова Original: function to call The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
sb	-	указатель на streambuffer читать данные Original: pointer to the streambuffer to read the data from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Возвращаемое значение

*this

Notes

Есть нет перегрузки для указателей на летучих или указателей на функции (кроме тех, с подписями принято 9) перегрузки). Попытка вывода таких объектов вызывает неявное преобразование в bool, и для любой ненулевой указатель, значение 1 печатается (если boolalpha был установлен).

Original:

There are no overload for pointers to volatile or function pointers (other than the ones with signatures accepted by the 9) overload). Attempting to output such objects invokes implicit conversion to bool, and, for any non-null pointer value, the value 1 is printed (unless boolalpha was set).

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Пример

#include <iostream>
#include <iomanip>
#include <sstream>
int main()
{
    std::istringstream input(" \"Some text.\" ");
    volatile int n = 42;
    double f = 3.14;
    bool b = true;;
    std::cout << n   // int overload
              << ' ' // non-member overload
              << std::boolalpha << b // bool overload
              << " " // non-member overload
              << std::fixed << f // double overload
              << input.rdbuf() // streambuf overload
              << &n // bool overload
              << std::endl; // function overload
}

Вывод:

42 true 3.140000 "Some text." true

См. также

operator<<(std::basic_ostream)	вставками символьных данных Original: inserts character data The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
operator<< operator>>	выполняет поток ввода / вывода строк Original: performs stream I/O of strings The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон функции)
operator<< operator>>	выполняет входной поток и выход bitsets Original: performs stream input and output of bitsets The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
operator<< operator>>	сериализации и десериализации комплексного числа Original: serializes and deserializes a complex number The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (шаблон функции)
operator<< operator>>	осуществляет входной поток и выход на псевдослучайных чисел двигателя Original: performs stream input and output on pseudo-random number engine The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
operator<< operator>>	осуществляет входной поток и выход на псевдослучайных чисел распределения Original: performs stream input and output on pseudo-random number distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (функция)
put	вставками характер Original: inserts a character The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public функция-член)
write	вставки блоков символов Original: inserts blocks of characters The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (public функция-член)