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std::basic_istream::tellg

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< cpp‎ | io‎ | basic istream
 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
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Buffers
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(obsoleto)
Arroyos
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Streams
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Abstracciones
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Abstractions
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File I / O
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File I/O
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Cadena de I / O
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String I/O
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Matriz I / O
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Array I/O
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(obsoleto)
(obsoleto)
(obsoleto)
Tipos
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Types
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Error interfaz categoría
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Error category interface
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(C++11)
 
std::basic_istream
Los objetos globales
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Global objects
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Las funciones miembro
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Member functions
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Entrada con formato
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Formatted input
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Entrada sin formato
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Unformatted input
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Posicionamiento
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Positioning
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basic_istream::tellg
Varios
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Miscellaneous
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Clases de miembros
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Member classes
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Terceros funciones
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Non-member functions
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pos_type tellg();

Returns input position indicator of the current associated streambuf object.

Behaves as UnformattedInputFunction. After constructing and checking the sentry object, if fail()==true, returns pos_type(-1). Otherwise, returns rdbuf()->pubseekoff(0, std::ios_base::cur, std::ios_base::in).

Contenido

[editar] Parámetros

(Ninguno)
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(none)
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[editar] Valor de retorno

current position of the get pointer on success, pos_type(-1) on failure

[editar] Ejemplo

#include <iostream>
#include <string>
#include <sstream>
int main()
{
    std::string str = "Hello, world";
    std::istringstream in(str);
    std::string word;
    in >> word;
    std::cout << "After reading the word \"" << word
              << "\" tellg() returns " << in.tellg() << '\n';
}

Salida:

After reading the word "Hello," tellg() returns 6

[editar] Ver también

sets the input position indicator
(función miembro público) [editar]
devuelve el indicador de posición de salida
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returns the output position indicator
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(función miembro público de std::basic_ostream) [editar]
establece el indicador de posición de salida
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sets the output position indicator
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(función miembro público de std::basic_ostream) [editar]