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    strtol, strtoll

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    <metanoindex/>

     
    C
     
    Stringhe libreria
     
    Null-stringhe terminate byte
    Funzioni
    Original:
    Functions
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    Carattere manipolazione
    Original:
    Character manipulation
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    Le conversioni in formati numerici
    Original:
    Conversions to numeric formats
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    Della gestione delle stringhe
    Original:
    String manipulation
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    strcpy
    strncpy
    strcat
    strncat
    strxfrm
    String esame
    Original:
    String examination
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    Memoria manipolazione
    Original:
    Memory manipulation
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    memchr
    memcmp
    memset
    memcpy
    memmove
    Varie
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    Miscellaneous
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    strerror
     
    <tbody> </tbody>
    Elemento definito nell'header <stdlib.h>
    long strtol( const char *str, char **str_end, int base );
    long long strtoll( const char *str, char **str_end, int base );
    Interpreta un valore intero in una stringa di byte puntato da str.
    Original:
    Interprets an integer value in a byte string pointed to by str.
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    Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid base-n (where n=base) integer number representation and converts them to an integer value. The valid integer value consists of the following parts:

    • (opzionale) plus or minus sign
    • (opzionale) prefix (0) indicating octal base (applies only when the base is 8)
    • (opzionale) prefix (0x or 0X) indicating hexadecimal base (applies only when the base is 16)
    • a sequence of digits

    The set of valid digits for base-2 integer is 01, for base-3 integer is 012, and so on. For bases larger than 10, valid digits include alphabetic characters, starting from Aa for base-11 integer, to Zz for base-36 integer. The case of the characters is ignored.

    Le funzioni imposta il puntatore puntato da str_end per puntare al carattere dopo l'ultimo carattere interpretato. Se str_end è NULL, viene ignorato.
    Original:
    The functions sets the pointer pointed to by str_end to point to the character past the last character interpreted. If str_end is NULL, it is ignored.
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    Se il str è vuoto o non ha la forma prevista, la conversione non viene eseguita, e (se non è str_end NULL) il valore di str è memorizzato nell'oggetto puntato da str_end.
    Original:
    If the str is empty or does not have the expected form, no conversion is performed, and (if str_end is not NULL) the value of str is stored in the object pointed to by str_end.
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    Parametri

    str -
    puntatore alla stringa con terminazione null byte da interpretare
    Original:
    pointer to the null-terminated byte string to be interpreted
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    str_end -
    puntatore a un puntatore a carattere .
    Original:
    pointer to a pointer to character.
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    base -
    Base del valore intero interpretato
    Original:
    base of the interpreted integer value
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    Valore di ritorno

    • In caso di successo, un valore intero corrispondente al contenuto di str viene restituito.
      Original:
      If successful, an integer value corresponding to the contents of str is returned.
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    • Se il valore convertito cade fuori dalla portata del tipo di ritorno corrispondente, si verifica un errore di campo (impostazione errno a ERANGE) e LONG_MAX, LONG_MIN, LLONG_MAX o LLONG_MIN viene restituito.
      Original:
      If the converted value falls out of range of corresponding return type, a range error occurs (setting errno to ERANGE) and LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN is returned.
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    • Se la conversione non può essere eseguita, viene restituito 0.
      Original:
      If no conversion can be performed, 0 is returned.
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    Esempio

    This section is incomplete
    Reason: no example

    Vedi anche
    converte una stringa di byte in un valore intero
    Original:
    converts a byte string to an integer value
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    (funzione) [modifica]
    converte una stringa di byte in un valore intero senza segno
    Original:
    converts a byte string to an unsigned integer value
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    (funzione) [modifica]
    C++ documentation for strtol, strtoll