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std::cout, std::wcout

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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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coutwcout
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 cout;
 (1)
extern std::wostream wcout;
 (2)
Os objectos globais std::cout e std::wcout saída de controle de fluxo de um tampão de aplicação (tipo definido derivado de std::streambuf), associado com o padrão de fluxo de saída C stdout.
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The global objects std::cout and std::wcout control output to a stream buffer of implementation-defined type (derived from std::streambuf), associated with the standard C output stream stdout.
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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::cout no código do usuário.
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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::cout 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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Uma vez inicializado, é std::cout empate () 'd para std::cin e std::wcout é laço ()' d para std::wcin, o que significa que qualquer operação de entrada em std::cin executa std::cout.flush() (via construtor de std::basic_istream::sentry).
Original:
Once initialized, std::cout is tie()'d to std::cin and std::wcout is tie()'d to std::wcin, meaning that any input operation on std::cin executes std::cout.flush() (via std::basic_istream::sentry's constructor).
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Uma vez inicializado, std::cout também é amarrar () 'd para std::cerr e std::wcout é laço ()' d para std::wcerr, o que significa que qualquer operação de saída em std::cerr executa std::cout.flush() (via construtor de std::basic_ostream::sentry) (desde C++11)
Original:
Once initialized, std::cout is also tie()'d to std::cerr and std::wcout is tie()'d to std::wcerr,, meaning that any output operation on std::cerr executes std::cout.flush() (via std::basic_ostream::sentry's constructor) (desde C++11)
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[editar] Exemplo

#include <iostream>
struct Foo {
    int n;
    Foo() {
       std::cout << "static constructor\n";
    }
    ~Foo() {
       std::cout << "static destructor\n";
    }
};
Foo f; // static object
int main()
{
    std::cout << "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]
escreve para o padrão stderr
(objeto global) fluxo de erro C
Original:
writes to the standard C error stream stderr
(objeto global)
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[edit]
cout
wcout
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]
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