Namespace
Varianti

std::ftell

Da cppreference.com.
< cpp‎ | io‎ | c

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
C-style I / O
Funzioni
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Functions
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Accesso ai file
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File access
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Diretta input / output
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Direct input/output
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fread
fwrite
Ingresso formattato / uscita
Original:
Unformatted input/output
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Formattato di input / output
Original:
Formatted input/output
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File di posizionamento
Original:
File positioning
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ftell
fgetpos
fseek
fsetpos
rewind
La gestione degli errori
Original:
Error handling
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clearerr
feof
ferror
perror
Le operazioni sui file
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Operations on files
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remove
rename
tmpfile
tmpnam
 
Defined in header <cstdio>
long ftell( std::FILE* stream );
Restituisce il valore corrente dell'indicatore di posizione per il file di stream flusso di file.
Original:
Returns the current value of the file position indicator for the file stream stream.
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Se il flusso è aperto in modalità binaria, il valore ottenuto da questa funzione è il numero di byte dall'inizio del file.
Original:
If the stream is open in binary mode, the value obtained by this function is the number of bytes from the beginning of the file.
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Se il flusso è aperto in modalità testo, il valore restituito da questa funzione non è specificato e ha senso solo come input per std::fseek
Original:
If the stream is open in text mode, the value returned by this function is unspecified and is only meaningful as the input to std::fseek
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Indice

[modifica] Parametri

stream -
stream file da esaminare
Original:
file stream to examine
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[modifica] Valore di ritorno

File indicatore di posizione in caso di successo o -1L se guasto. Consente inoltre di impostare errno in caso di fallimento.
Original:
File position indicator on success or -1L if failure occurs. Also sets errno on failure.
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[modifica] Esempio

[modifica] Vedi anche

ottiene l'indicatore di posizione del file
Original:
gets the file position indicator
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(funzione) [edit]
si sposta l'indicatore di posizione file in una posizione specifica in un file
Original:
moves the file position indicator to a specific location in a file
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(funzione) [edit]
si sposta l'indicatore di posizione file in una posizione specifica in un file
Original:
moves the file position indicator to a specific location in a file
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(funzione) [edit]
C documentation for ftell