Espaços nominais
Variantes
Acções

std::clog, std::wclog

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C++
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
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Buffers
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(obsoleta)
Streams
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Streams
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Abstrações
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Abstractions
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File I / O
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File I/O
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Cordas I / O
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String I/O
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Matriz de I / O
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Array I/O
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(obsoleta)
(obsoleta)
(obsoleta)
Tipos
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Types
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Interface de categoria de erro
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Error category interface
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(C++11)
(C++11)
 
std::basic_ostream
Objetos globais
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Global objects
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clogwclog
Funções de membro
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Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Entrada formatada
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Formatted input
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basic_ostream::operator<<
Entrada não formatado
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Unformatted input
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basic_ostream::put
basic_ostream::write
Posicionamento
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Positioning
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basic_ostream::tellp
basic_ostream::seekp
Diversos
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Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Aulas-Membros
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Member classes
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basic_ostream::sentry
Não-membros funções
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Non-member functions
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Definido no cabeçalho <iostream>
extern std::ostream clog;
 (1)
extern std::wostream wclog;
 (2)
Os objectos globais std::clog e std::wclog saída de controle de fluxo de um tampão de aplicação (tipo definido derivado de std::streambuf), associado com o padrão de fluxo de saída stderr C, mas, ao contrário std::cerr / std::wcerr, estes fluxos não são automaticamente eliminadas e não automaticamente amarrar ( ) 'd com cout.
Original:
The global objects std::clog and std::wclog control output to a stream buffer of implementation-defined type (derived from std::streambuf), associated with the standard C output stream stderr, but, unlike std::cerr/std::wcerr, these streams are not automatically flushed and not automatically tie()'d with cout.
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Esses objetos são garantidos para ser construído antes de o primeiro construtor de um objeto estático é chamado e eles são garantidos para sobreviver à última destruidor de um objeto estático, de modo que é sempre possível escrever para std::clog no código do usuário.
Original:
These objects are guaranteed to be constructed before the first constructor of a static object is called and they are guaranteed to outlive the last destructor of a static object, so that it is always possible to write to std::clog in user code.
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A menos que sync_with_stdio(false) foi emitido, ele é seguro para acessar simultaneamente esses objetos de vários segmentos, tanto para saída formatada e não formatado.
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Unless sync_with_stdio(false) has been issued, it is safe to concurrently access these objects from multiple threads for both formatted and unformatted output.
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[editar] Exemplo

#include <iostream>
struct Foo {
    int n;
    Foo() {
       std::clog << "static constructor\n";
    }
    ~Foo() {
       std::clog << "static destructor\n";
    }
};
Foo f; // static object
int main()
{
    std::clog << "main function\n";
}

Saída: 

static constructor
main function
static destructor

[editar] Veja também
inicializa objetos de fluxo padrão
Original:
initializes standard stream objects
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(of std::ios_base public class membro) [edit]
grava o fluxo de erro padrão C stderr, unbuffered
(objeto global)
Original:
writes to the standard C error stream stderr, unbuffered
(objeto global)
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[edit]
grava o padrão de fluxo de saída stdout
(objeto global) C
Original:
writes to the standard C output stream stdout
(objeto global)
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[edit]
Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/io/clog&oldid=20781"