operator>><div class="t-tr-text">(Std :: basic_istream)<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_istream)</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>

 

C++

Idioma

Conceptos

Utilidades de la biblioteca

Strings biblioteca

Contenedores biblioteca

Algoritmos biblioteca

Los iteradores biblioteca

Numéricos biblioteca

Entrada / salida de la biblioteca

Localizaciones biblioteca

Expresiones biblioteca Regular (C++11)

Operaciones de biblioteca Atómica (C++11)

Tema Biblioteca de ayuda (C++11)

 

Entrada / salida de la biblioteca

I / O manipuladores

C-estilo I / O

Buffers Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (obsoleto)

Arroyos Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Abstracciones Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

basic_ofstream

basic_fstream

Cadena de I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istringstream

basic_ostringstream

basic_stringstream

Matriz I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (obsoleto)

ostrstream (obsoleto)

strstream (obsoleto)

Tipos Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

streamsize

fpos

Error interfaz categoría Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

std::basic_istream

Los objetos globales Original: Global objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

cin wcin

Las funciones miembro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::basic_istream

basic_istream::~basic_istream

basic_istream::operator= (C++11)

Entrada con formato Original: Formatted input The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::operator>>

Entrada sin formato Original: Unformatted input The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::get

basic_istream::peek

basic_istream::unget

basic_istream::putback

basic_istream::getline

basic_istream::ignore

basic_istream::read

basic_istream::readsome

basic_istream::gcount

Posicionamiento Original: Positioning The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::tellg

basic_istream::seekg

Varios Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::sync

basic_istream::swap (C++11)

Clases de miembros Original: Member classes The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istream::sentry

Terceros funciones Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator>>(std::basic_istream)

 

template< class CharT, class Traits > basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>& st, CharT& ch ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, signed char& ch ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, unsigned char& ch );	(1)
template< class CharT, class Traits> basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>& st, CharT* s ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, signed char* s ); template< class Traits > basic_istream<char,Traits>& operator>>( basic_istream<char,Traits>& st, unsigned char* s );	(2)
template< class CharT, class Traits, class T > basic_istream<CharT,Traits>& operator>>( basic_istream<CharT,Traits>&& st, T& value );	(3)	(ya que C + +11)

Realiza operaciones de entrada de caracteres .

Original:

Performs character input operations.

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1)

Extractos de un personaje y lo almacena en ch .

Original:

Extracts a character and stores it to ch.

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2)

Extrae caracteres sucesivos y los almacena en lugares sucesivos de una matriz de caracteres cuyo primer elemento es apuntado por s. La extracción se detiene si una de las condiciones siguientes:

Original:

Extracts successive characters and stores them at successive locations of a character array whose first element is pointed to by s. The extraction stops if one of the following conditions are met:

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• un carácter de espacio (como se determina por la faceta ctype<CharT>) se encuentra. El espacio en blanco no se extrae .

  Original:

  a whitespace character (as determined by the ctype<CharT> facet) is found. The whitespace character is not extracted.

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• this->width() - 1 caracteres se extraen

  Original:

  this->width() - 1 characters are extracted

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En cualquier caso, un carácter nulo adicional CharT() valor se almacena en el extremo de la salida .

Original:

In either case, an additional null character value CharT() is stored at the end of the output.

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3)

Llama al operador de extracción adecuado, dada una referencia a un objeto rvalue flujo de entrada (equivalente a st >> value) .

Original:

Calls the appropriate extraction operator, given an rvalue reference to an input stream object (equivalent to st >> value).

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Notas

Las versiones (1-2) de la operadora se comportan como funciones de entrada con formato'. Es decir, construir un objeto sentry al principio que vacía el empate () 'd tampones si es necesario, el control de errores, así como extractos y descarta todos los principales espacios en blanco a menos que la bandera ios_base :: skipws fue absuelto. La entrada se trató sólo si el objeto sentry devuelve true .

Original:

The (1-2) versions of the operator behave as formatted input functions. That is, they construct a sentry object at the beginning that flushes the tie()'d buffers if needed, checks for errors, and extracts and discards all leading whitespace characters unless the ios_base::skipws flag was cleared. The input is attempted only if the sentry object returns true.

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Parámetros

st	-	flujo de entrada para extraer los datos de Original: input stream to extract the data from The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ch	-	referencia a un carácter para almacenar el carácter extraídos Original: reference to a character to store the extracted character to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
s	-	puntero a una cadena de caracteres para almacenar los caracteres extraídos Original: pointer to a character string to store the extracted characters to The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

st

Ejemplo

#include <iostream>
#include <iomanip>
#include <sstream>
 
int main()
{
    std::string input = "n greetings";
    std::istringstream stream(input);
    char c;
    const int MAX = 6;
    char cstr[MAX];
 
    stream >> c >> std::setw(MAX) >> cstr;
    std::cout << "c = " << c << '\n'
              << "cstr = " << cstr << '\n';
 
    double f;
    std::istringstream("1.23") >> f; // rvalue stream extraction
    std::cout << "f = " << f << '\n';
}

Output:

c = n
cstr = greet
f = 1.23

Ver también

operator>>	extractos de formato de datos Original: extracts formatted data The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función)