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operator<<<div class="t-tr-text">(Std :: basic_ostream)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">Original:</div><div class="t-tr-dropdown-orig">(std::basic_ostream)</div><div class="t-tr-dropdown-notes">The text has been machine-translated via [http://translate.google.com Google Translate].<br/> You can help to correct and verify the translation. Click [http://en.cppreference.com/w/Cppreference:MachineTranslations here] for instructions.</div></div></div></div></div>

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< cpp‎ | io‎ | basic ostream

 
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
Original:
Streams
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Abstrações
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cordas I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
Original:
Array I/O
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istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
Original:
Types
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streamoff
streamsize
fpos
Interface de categoria de erro
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_ostream
Objetos globais
Original:
Global objects
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Funções de membro
Original:
Member functions
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basic_ostream::basic_ostream
basic_ostream::~basic_ostream
basic_ostream::operator=(C++11)
Entrada formatada
Original:
Formatted input
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basic_ostream::operator<<
Entrada não formatado
Original:
Unformatted input
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basic_ostream::put
basic_ostream::write
Posicionamento
Original:
Positioning
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basic_ostream::tellp
basic_ostream::seekp
Diversos
Original:
Miscellaneous
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basic_ostream::flush
basic_ostream::swap(C++11)
Aulas-Membros
Original:
Member classes
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basic_ostream::sentry
Não-membros funções
Original:
Non-member functions
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operator<<(std::basic_ostream)
 
template< class CharT, class Traits>

basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os,
                                         CharT ch );
template< class CharT, class Traits>
basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os,
                                         char ch );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os,
                                        char ch );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os,
                                        signed char ch );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os,

                                        unsigned char ch );
(1)
template< class CharT, class Traits >

basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os,
                                         const CharT* s );
template< class CharT, class Traits >
basic_ostream<CharT,Traits>& operator<<( basic_ostream<CharT,Traits>& os,
                                         const char* s );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os,  
                                        const char* s );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,Traits>& os,
                                        const signed char* s );
template< class Traits >
basic_ostream<char,Traits>& operator<<( basic_ostream<char,traits>& os,

                                        const unsigned char* s );
(2)
template< class CharT, class Traits, class T >

basic_ostream< charT, traits >& operator<<( basic_ostream<CharT,Traits>&& os,

                                            const T& value );
(3) (a partir do C++ 11)
Insere um caractere ou uma cadeia de caracteres.
Original:
Inserts a character or a character string.
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1-2)
são formatados funções de saída: eles começam a execução através da construção de um objeto de sentry tipo, o que esvazia os buffers de saída tie()'d se necessário e verifica os erros de fluxo. Após a construção, se os retornos de sentinela objeto false, essas funções retornam sem tentar qualquer saída. Se ocorrer um erro durante a saída, estas funções chamam setstate(ios_base::failbit). Se uma exceção é lançada durante a saída, então ios :: badbit está definido (a exceção é suprimida a menos exceptions()&badbit) != 0, caso em que é relançada)
Original:
are formatted output functions: they begin execution by constructing an object of type sentry, which flushes the tie()'d output buffers if necessary and checks the stream errors. After construction, if the sentry object returns false, these functions return without attempting any output. If an error occurs during output, these functions call setstate(ios_base::failbit). If an exception is thrown during output, then ios::badbit is set (the exception is suppressed unless exceptions()&badbit) != 0, in which case it is rethrown)
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1)
Insere uma ch personagem. Se o tipo de caracteres não é CharT, ele é primeiro convertido com os.widen(ch). O preenchimento é determinado como se de Fase 3 de num_put::put(). Após a inserção, é chamado width(0).
Original:
Inserts a character ch. If the type of the character is not CharT, it is first converted with os.widen(ch). Padding is determined as if by Stage 3 of num_put::put(). After insertion, width(0) is called.
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2)
Insere personagens sucessivas da matriz de caracteres cujo primeiro elemento é apontado por s.
Original:
Inserts successive characters from the character array whose first element is pointed to by s.
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  • para as sobrecargas primeiro e terceiro (onde CharT corresponde ao tipo de ch), exatamente traits::length(s) personagens estão inseridos.
    Original:
    for the first and third overloads (where CharT matches the type of ch), exactly traits::length(s) characters are inserted.
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  • para a segunda sobrecarga, exatamente std::char_traits<char>::length(s) personagens estão inseridos.
    Original:
    for the second overload, exactly std::char_traits<char>::length(s) characters are inserted.
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  • para os dois últimos sobrecargas, exatamente traits::length(reinterpret_cast<const char*>(s)) estão inseridos.
    Original:
    for the last two overloads, exactly traits::length(reinterpret_cast<const char*>(s)) are inserted.
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O preenchimento é determinado como se de Fase 3 de num_put::put(). Todos os personagens são alargadas usando os.widen() antes da inserção. Após a inserção, é chamado width(0).
Original:
Padding is determined as if by Stage 3 of num_put::put(). All characters are widened using os.widen() before insertion. After insertion, width(0) is called.
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3)
Chama o operador de inserção apropriada, dada uma referência a um objeto rvalue fluxo de saída (equivalente a os << value).
Original:
Calls the appropriate insertion operator, given an rvalue reference to an output stream object (equivalent to os << value).
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Índice

[editar] Parâmetros

os -
saída de fluxo de dados para inserir
Original:
output stream to insert data to
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ch -
referência a um personagem para inserir
Original:
reference to a character to insert
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s -
ponteiro para uma cadeia de caracteres para inserir
Original:
pointer to a character string to insert
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[editar] Valor de retorno

st

[editar] Exemplo

#include <iostream>
#include <sstream>
int main()
{
    std::cout << "Hello, world" // the const char* overlaod
              << '\n';          // the char overload
    std::string s = (std::ostringstream() << 1.2).str(); // rvalue overload
    std::cout << s << '\n';
}

Output:

Hello, world
1.2

[editar] Veja também

insere dados formatados
Original:
inserts formatted data
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(função pública membro) [edit]