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    std::scanf, std::fscanf, std::sscanf

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    <metanoindex/>

     
    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
    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
    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
    Original:
    Functions
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    Accesso ai file
    Original:
    File access
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    Diretta input / output
    Original:
    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
    Original:
    Operations on files
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    remove
    rename
    tmpfile
    tmpnam
     
    <tbody> </tbody>
    Elemento definito nell'header <cstdio>
    ​int scanf( const char *format, ... );​
    		 (1)
    int fscanf( FILE *stream, const char *format, ... );
    		 (2)
    int sscanf( const char *buffer, const char *format, ... );
    		 (3)
    Legge i dati dal una varietà di fonti, interpreta secondo format e memorizza il risultato in posizioni indicate.
    Original:
    Reads data from the a variety of sources, interprets it according to format and stores the results into given locations.
    The text has been machine-translated via Google Translate.
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    1)
    Legge i dati da stdin
    Original:
    Reads the data from stdin
    The text has been machine-translated via Google Translate.
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    2)
    Legge i dati dal file di flusso stream
    Original:
    Reads the data from file stream stream
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    3)
    Legge i dati di terminazione null buffer stringa di caratteri
    Original:
    Reads the data from null-terminated character string buffer
    The text has been machine-translated via Google Translate.
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    Parametri

    stream -
    file di flusso di input da cui leggere
    Original:
    input file stream to read from
    The text has been machine-translated via Google Translate.
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    buffer -
    puntatore ad una stringa con terminazione null di caratteri da leggere
    Original:
    pointer to a null-terminated character string to read from
    The text has been machine-translated via Google Translate.
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    format -
    puntatore ad una stringa con terminazione null carattere che specifica come leggere l'input.
    La stringa di formato è composto da caratteri di spaziatura (un singolo carattere spazio nella stringa di formato consuma tutte disponibili spazi successivi dall'ingresso), caratteri diversi da spazi ad eccezione % (ogni carattere ad esempio nelle stringhe di formato consuma esattamente un carattere identico dall'ingresso) e specifiche di conversione. Ogni specifica di conversione ha il seguente formato:
    Original:
    The format string consists of whitespace characters (any single whitespace character in the format string consumes all available consecutive whitespace characters from the input), non-whitespace characters except % (each such character in the format strings consumes exactly one identical character from the input) and conversion specifications. Each conversion specification has the following format:
    The text has been machine-translated via Google Translate.
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    • % carattere introduttivo
      Original:
      introductory % character
      The text has been machine-translated via Google Translate.
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    • (opzionale) assegnazione di soppressione * carattere. Se questa opzione è presente, la funzione non assegnare il risultato della conversione a qualsiasi argomento di ricezione.
      Original:
      (opzionale) assignment-suppressing character *. If this option is present, the function does not assign the result of the conversion to any receiving argument.
      The text has been machine-translated via Google Translate.
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    • (opzionale) intero numero (maggiore di zero) che specifica' massima larghezza del campo, cioè, il numero massimo di caratteri che la funzione è consentito consumare quando si fa la conversione specificata dalla specifica di conversione corrente. Si noti che [% s e% può portare a overflow del buffer se la larghezza non è previsto.
      Original:
      (opzionale) integer number (greater than zero) that specifies maximum field width, that is, the maximum number of characters that the function is allowed to consume when doing the conversion specified by the current conversion specification. Note that %s and %[ may lead to buffer overflow if the width is not provided.
      The text has been machine-translated via Google Translate.
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    • (opzionale) lunghezza' modificatore che specifica la dimensione dell'argomento ricevente, cioè il tipo di destinazione effettiva. Questo influenza la precisione della conversione e le regole di overflow. Il tipo di destinazione predefinita è diversa per ogni tipo di conversione (vedi tabella sotto).
      Original:
      (opzionale) length modifier that specifies the size of the receiving argument, that is, the actual destination type. This affects the conversion accuracy and overflow rules. The default destination type is different for each conversion type (see table below).
      The text has been machine-translated via Google Translate.
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    • conversione di formato
      Original:
      conversion format specifier
      The text has been machine-translated via Google Translate.
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    Gli identificatori di formato sono disponibili i seguenti:
    Original:
    The following format specifiers are available:
    The text has been machine-translated via Google Translate.
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    Conversion
    specifier     		Explanation Argument type
    length modifier hh h (none) l ll j z t L
    % matches literal % N/A N/A N/A N/A N/A N/A N/A N/A N/A
    c matches a single character N/A N/A
    char*
    wchar_t*
    		 N/A N/A N/A N/A N/A
    s matches a character string (a sequence of non-whitespace characters)
    [set]
    corrisponde a una sequenza non vuota di carattere dal set di personaggi.
    Original:
    matches a non-empty sequence of character from set of characters.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Se il primo carattere del set è ^, quindi non tutti i caratteri del set sono abbinati. Se il set inizia con ] o ^] poi il carattere ] è anche incluso nel set.
    Original:
    If the first character of the set is ^, then all characters not in the set are matched. If the set begins with ] or ^] then the ] character is also included into the set.
    The text has been machine-translated via Google Translate.
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    d
    corrisponde a intero decimale' un.
    Original:
    matches a decimal integer'.
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    Il formato del numero è uguale a quello previsto dal strtol() 10 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 10 for the base argument
    The text has been machine-translated via Google Translate.
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    signed char* or unsigned char*
    signed short* or unsigned short*
    signed int* or unsigned int*
    signed long* or unsigned long*
    signed long long* or unsigned long long*
    intmax_t* or uintmax_t*
    size_t*
    ptrdiff_t*
    		 N/A
    i
    corrisponde a intero decimale' un.
    Original:
    matches a decimal integer'.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtol() 0 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 0 for the base argument
    The text has been machine-translated via Google Translate.
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    u
    corrisponde a un intero decimale senza segno'.
    Original:
    matches a unsigned decimal integer'.
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    Il formato del numero è uguale a quello previsto dal strtoul() 0 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtoul() with the value 0 for the base argument
    The text has been machine-translated via Google Translate.
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    o
    corrisponde a un 'ottale intero'.
    Original:
    matches an octal integer.
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    Il formato del numero è uguale a quello previsto dal strtol() 8 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 8 for the base argument
    The text has been machine-translated via Google Translate.
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    x
    corrisponde a esadecimale intero' un.
    Original:
    matches an hexadecimal integer'.
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    Il formato del numero è uguale a quello previsto dal strtol() 16 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 16 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    n
    restituisce 'il numero di caratteri letti fino ad ora' la.
    Original:
    returns the number of characters read so far.
    The text has been machine-translated via Google Translate.
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    Nessun input viene consumato. Non incrementare il numero di assegnazione. Se l'identificatore è assegnazione di soppressione operatore definito, il comportamento è indefinito
    Original:
    No input is consumed. Does not increment the assignment count. If the specifier has assignment-suppressing operator defined, the behavior is undefined
    The text has been machine-translated via Google Translate.
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    a, A
    e, E
    f, F
    g, G
    corrisponde a un 'numero in virgola mobile'.
    Original:
    matches a floating-point number.
    The text has been machine-translated via Google Translate.
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    Il formato del numero è uguale a quello previsto dal strtof()
    Original:
    The format of the number is the same as expected by strtof()
    The text has been machine-translated via Google Translate.
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    		 N/A N/A
    float*
    double*
    		 N/A N/A N/A N/A
    long double*
    p
    corrisponde sequenza di caratteri attuazione definito la definizione di un 'puntatore'.
    Original:
    matches implementation defined character sequence defining a pointer.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Famiglia printf delle funzioni dovrebbe produrre la stessa sequenza utilizzando il formato %p identificatore
    Original:
    printf family of functions should produce the same sequence using %p format specifier
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    		 N/A N/A
    void**
    		 N/A N/A N/A N/A N/A N/A
    Original:
    pointer to a null-terminated character string specifying how to read the input.
    La stringa di formato è composto da caratteri di spaziatura (un singolo carattere spazio nella stringa di formato consuma tutte disponibili spazi successivi dall'ingresso), caratteri diversi da spazi ad eccezione % (ogni carattere ad esempio nelle stringhe di formato consuma esattamente un carattere identico dall'ingresso) e specifiche di conversione. Ogni specifica di conversione ha il seguente formato:
    Original:
    The format string consists of whitespace characters (any single whitespace character in the format string consumes all available consecutive whitespace characters from the input), non-whitespace characters except % (each such character in the format strings consumes exactly one identical character from the input) and conversion specifications. Each conversion specification has the following format:
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    • % carattere introduttivo
      Original:
      introductory % character
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (opzionale) assegnazione di soppressione * carattere. Se questa opzione è presente, la funzione non assegnare il risultato della conversione a qualsiasi argomento di ricezione.
      Original:
      (opzionale) assignment-suppressing character *. If this option is present, the function does not assign the result of the conversion to any receiving argument.
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (opzionale) intero numero (maggiore di zero) che specifica' massima larghezza del campo, cioè, il numero massimo di caratteri che la funzione è consentito consumare quando si fa la conversione specificata dalla specifica di conversione corrente. Si noti che [% s e% può portare a overflow del buffer se la larghezza non è previsto.
      Original:
      (opzionale) integer number (greater than zero) that specifies maximum field width, that is, the maximum number of characters that the function is allowed to consume when doing the conversion specified by the current conversion specification. Note that %s and %[ may lead to buffer overflow if the width is not provided.
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • (opzionale) lunghezza' modificatore che specifica la dimensione dell'argomento ricevente, cioè il tipo di destinazione effettiva. Questo influenza la precisione della conversione e le regole di overflow. Il tipo di destinazione predefinita è diversa per ogni tipo di conversione (vedi tabella sotto).
      Original:
      (opzionale) length modifier that specifies the size of the receiving argument, that is, the actual destination type. This affects the conversion accuracy and overflow rules. The default destination type is different for each conversion type (see table below).
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    • conversione di formato
      Original:
      conversion format specifier
      The text has been machine-translated via Google Translate.
      You can help to correct and verify the translation. Click here for instructions.
    Gli identificatori di formato sono disponibili i seguenti:
    Original:
    The following format specifiers are available:
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Conversion
    specifier     		Explanation Argument type
    length modifier hh h (none) l ll j z t L
    % matches literal % N/A N/A N/A N/A N/A N/A N/A N/A N/A
    c matches a single character N/A N/A
    char*
    wchar_t*
    		 N/A N/A N/A N/A N/A
    s matches a character string (a sequence of non-whitespace characters)
    [set]
    corrisponde a una sequenza non vuota di carattere dal set di personaggi.
    Original:
    matches a non-empty sequence of character from set of characters.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Se il primo carattere del set è ^, quindi non tutti i caratteri del set sono abbinati. Se il set inizia con ] o ^] poi il carattere ] è anche incluso nel set.
    Original:
    If the first character of the set is ^, then all characters not in the set are matched. If the set begins with ] or ^] then the ] character is also included into the set.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    d
    corrisponde a intero decimale' un.
    Original:
    matches a decimal integer'.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtol() 10 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 10 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    signed char* or unsigned char*
    signed short* or unsigned short*
    signed int* or unsigned int*
    signed long* or unsigned long*
    signed long long* or unsigned long long*
    intmax_t* or uintmax_t*
    size_t*
    ptrdiff_t*
    		 N/A
    i
    corrisponde a intero decimale' un.
    Original:
    matches a decimal integer'.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtol() 0 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 0 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    u
    corrisponde a un intero decimale senza segno'.
    Original:
    matches a unsigned decimal integer'.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtoul() 0 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtoul() with the value 0 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    o
    corrisponde a un 'ottale intero'.
    Original:
    matches an octal integer.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtol() 8 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 8 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    x
    corrisponde a esadecimale intero' un.
    Original:
    matches an hexadecimal integer'.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtol() 16 con il valore per l'argomento base
    Original:
    The format of the number is the same as expected by strtol() with the value 16 for the base argument
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    n
    restituisce 'il numero di caratteri letti fino ad ora' la.
    Original:
    returns the number of characters read so far.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Nessun input viene consumato. Non incrementare il numero di assegnazione. Se l'identificatore è assegnazione di soppressione operatore definito, il comportamento è indefinito
    Original:
    No input is consumed. Does not increment the assignment count. If the specifier has assignment-suppressing operator defined, the behavior is undefined
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    a, A
    e, E
    f, F
    g, G
    corrisponde a un 'numero in virgola mobile'.
    Original:
    matches a floating-point number.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Il formato del numero è uguale a quello previsto dal strtof()
    Original:
    The format of the number is the same as expected by strtof()
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    		 N/A N/A
    float*
    double*
    		 N/A N/A N/A N/A
    long double*
    p
    corrisponde sequenza di caratteri attuazione definito la definizione di un 'puntatore'.
    Original:
    matches implementation defined character sequence defining a pointer.
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    Famiglia printf delle funzioni dovrebbe produrre la stessa sequenza utilizzando il formato %p identificatore
    Original:
    printf family of functions should produce the same sequence using %p format specifier
    The text has been machine-translated via Google Translate.
    You can help to correct and verify the translation. Click here for instructions.
    		 N/A N/A
    void**
    		 N/A N/A N/A N/A N/A N/A
    The text has been machine-translated via Google Translate.
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    ... -
    ricezione argomenti
    Original:
    receiving arguments
    The text has been machine-translated via Google Translate.
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    Valore di ritorno

    Numero di ricevere argomenti successo assegnata, o EOF se il difetto di lettura si verifica prima che il primo argomento di ricezione è stato assegnato.
    Original:
    Number of receiving arguments successfully assigned, or EOF if read failure occurs before the first receiving argument was assigned.
    The text has been machine-translated via Google Translate.
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    Esempio

    This section is incomplete
    Reason: no example

    Vedi anche

    (C++11)
    (C++11)
    (C++11)
    legge l'input formattato da stdin, un flusso di file o un buffer
    utilizzando elenco di argomenti variabili
    Original:
    reads formatted input from stdin, a file stream or a buffer
    using variable argument list
    The text has been machine-translated via Google Translate.
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    (funzione) [modifica]
    ottiene una stringa di caratteri da un flusso di file
    Original:
    gets a character string from a file stream
    The text has been machine-translated via Google Translate.
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    (funzione) [modifica]



    (C++11)
    stampe formattata uscita stdout, un flusso di file o di un buffer
    Original:
    prints formatted output to stdout, a file stream or a buffer
    The text has been machine-translated via Google Translate.
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    (funzione) [modifica]
    C documentation for scanf, fscanf, sscanf