C-style file input/output
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O subconjunto CI / O do C + + biblioteca padrão implementa C-estilo fluxo de entrada / saída operações. O cabeçalho
<cstdio> fornece suporte à operação genérica arquivo e funções de suprimentos com estreitas e multibyte caracteres de entrada / saída de recursos, eo cabeçalho <cwchar> fornece funções com a entrada de caracteres de largura / capacidades de saída. Original:
The C I/O subset of the C++ standard library implements C-style stream input/output operations. The
<cstdio> header provides generic file operation support and supplies functions with narrow and multibyte character input/output capabilities, and the <cwchar> header provides functions with wide character input/output capabilities. The text has been machine-translated via Google Translate.
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Fluxos C são objetos de std::FILE tipo que só podem ser acessados e manipulados através de ponteiros da Nota tipo std::FILE* (: embora possa ser possível criar um objeto local de std::FILE tipo por dereferencing e copiar um FILE* válido, usando o endereço de tal cópia em as funções de I / O é um comportamento indefinido). Cada fluxo C está associada a um dispositivo externo físico (arquivo, fluxo de entrada padrão, impressora, porta serial, etc).
Original:
C streams are objects of type std::FILE that can only be accessed and manipulated through pointers of type std::FILE* (Note: while it may be possible to create a local object of type std::FILE by dereferencing and copying a valid FILE*, using the address of such copy in the I/O functions is undefined behavior). Each C stream is associated with an external physical device (file, standard input stream, printer, serial port, etc).
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Fluxos C pode ser usado tanto para entrada como não formatado e formatado e saída. Eles são sensíveis à localidade e pode realizar amplas / multibyte conversões necessárias. Ao contrário de C + + riachos, onde cada fluxo está associado com a sua própria localidade, todos os fluxos de C acessar o objeto mesmo local: o mais recentemente instalado com std::setlocale.
Original:
C streams can be used for both unformatted and formatted input and output. They are locale-sensitive and may perform wide/multibyte conversions as necessary. Unlike C++ streams, where each stream is associated with its own locale, all C streams access the same locale object: the one most recently installed with std::setlocale.
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Além do sistema de informações específicas necessárias para acessar o dispositivo (por exemplo, um descritor de arquivo POSIX), cada objeto de fluxo de C tem o seguinte:
Original:
Besides the system-specific information necessary to access the device (e.g. a POSIX file descriptor), each C stream object holds the following:
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1)
Largura de caractere: estreita ou larga
Original:
Character width: narrow or wide
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2)
Buffer estado: unbuffered, linha-tampão, com buffer.
Original:
Buffering state: unbuffered, line-buffered, fully buffered.
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3)
O tampão, o qual pode ser substituído por uma fonte externa, tampão fornecido pelo utilizador.
Original:
The buffer, which may be replaced by an external, user-provided buffer.
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4)
I / O modo: de entrada, de saída, ou de atualização (entrada e saída).
Original:
I/O mode: input, output, or update (both input and output).
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5)
Binário / indicador do modo texto.
Original:
Binary/text mode indicator.
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6)
Fim-de-arquivo indicador de status.
Original:
End-of-file status indicator.
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7)
Indicador de status de erro.
Original:
Error status indicator.
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8)
Indicador de posição do arquivo (um objeto do tipo std::fpos_t), que, para fluxos de caracteres de largura, inclui o estado parse (um objeto do tipo mbstate_t).
Original:
File position indicator (an object of type std::fpos_t), which, for wide character streams, includes the parse state (an object of type mbstate_t).
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