std::basic_streambuf::sputn, std::basic_streambuf::xsputn
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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) | |
Chama
2) xsputn(s, count) da classe mais derivada.Original:
Calls
xsputn(s, count) of the most derived class.The text has been machine-translated via Google Translate.
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Grava caracteres
count para a seqüência de saída da matriz de caracteres cujo primeiro elemento é apontado por s. Os caracteres são escritos como se por chamadas repetidas para sputc(). Escrita pára quando quer count caracteres são escritos ou uma chamada para sputc() teria retornado 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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Se a área torna-se colocar plena (pptr()==epptr()), esta função pode chamar
overflow(), ou obter o efeito de overflow() chamando por algum outro, não especificado, significa.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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Índice |
[editar] Parâmetros
(Nenhum)
Original:
(none)
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[editar] Valor de retorno
O número de caracteres gravados com sucesso.
Original:
The number of characters successfully written.
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[editar] Exemplo
#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'; }
Saída:
The call to sputn() returned 14 The output sequence contains This is a test The call to sputn() on an input stream returned 0
[editar] Veja também
| Invoca 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. (função pública membro) | |