std::basic_streambuf::sputn, std::basic_streambuf::xsputn
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< cpp | io | basic streambuf
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| std::streamsize sputn( const char_type* s, std::streamsize count ); |
(1) | |
| protected: virtual std::streamsize xsputn( const char_type* s, std::streamsize count ); |
(2) | |
Звонки
2) xsputn(s, count) из самых производного класса.Original:
Calls
xsputn(s, count) of the most derived class.The text has been machine-translated via Google Translate.
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Пишет
count символов в выходной последовательности символов массив, первый элемент, на который указывает s. Символы записываются как если бы неоднократные призывы к sputc(). Написание останавливается, когда либо count символы записываются или вызов sputc() вернулся бы traits::eof().Original:
Writes
count characters to the output sequence from the character array whose first element is pointed to by s. The characters are written as if by repeated calls to sputc(). Writing stops when either count characters are written or a call to sputc() would have returned traits::eof().The text has been machine-translated via Google Translate.
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Если положить область становится полной (pptr()==epptr()), эту функцию можно назвать
overflow(), или добиться эффекта вызова overflow() некоторые другие, не указано, значит.Original:
If the put area becomes full (pptr()==epptr()), this function may call
overflow(), or achieve the effect of calling overflow() by some other, unspecified, means.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
Количество символов успешно записан.
Original:
The number of characters successfully written.
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[править] Пример
#include <iostream> #include <sstream> int main() { std::ostringstream s1; std::streamsize sz = s1.rdbuf()->sputn("This is a test", 14); s1 << '\n'; std::cout << "The call to sputn() returned " << sz << '\n' << "The output sequence contains " << s1.str(); std::istringstream s2; sz = s2.rdbuf()->sputn("This is a test", 14); std::cout << "The call to sputn() on an input stream returned " << sz << '\n'; }
Вывод:
The call to sputn() returned 14 The output sequence contains This is a test The call to sputn() on an input stream returned 0
[править] См. также
| Вызывает xsgetn() Original: invokes xsgetn() 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) | |
