Varianti

    isdigit

    Da cppreference.com.
    < c | string | byte
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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
    Original:
    Miscellaneous
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    strerror
     
    <tbody> </tbody>
    Elemento definito nell'header <ctype.h>
    int isdigit( int ch );
    Controlla se il carattere specificato è un carattere numerico (0123456789).
    Original:
    Checks if the given character is a numeric character (0123456789).
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    Parametri

    ch -
    carattere
    Original:
    character
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    Valore di ritorno

    Valore diverso da zero (true) se il carattere è un carattere numerico, 0 (false) altrimenti.
    Original:
    Non-zero value (true) if the character is a numeric character, 0 (false) otherwise.
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    Vedi anche
    Verifica se un carattere esteso è una cifra
    Original:
    checks if a wide character is a digit
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    (funzione) [modifica]
    C++ documentation for isdigit
    ASCII values
    (hex)     		characters

    iscntrl
    iswcntrl

    isprint
    iswprint

    isspace
    iswspace

    isblank
    iswblank

    isgraph
    iswgraph

    ispunct
    iswpunct

    isalnum
    iswalnum

    isalpha
    iswalpha

    isupper
    iswupper

    islower
    iswlower

    isdigit
    iswdigit

    isxdigit
    iswxdigit

    0 - 8 0x00-0x08 control codes (NUL, etc.) ≠0 0 0 0 0 0 0 0 0 0 0 0
    9 0x09 tab (\t) ≠0 0 ≠0 ≠0 0 0 0 0 0 0 0 0
    10 - 13 0x0A-0x0D whitespaces (\n,\v,\f,\r) ≠0 0 ≠0 0 0 0 0 0 0 0 0 0
    14 - 31 0x0E-0x1F control codes ≠0 0 0 0 0 0 0 0 0 0 0 0
    32 0x20 space 0 ≠0 ≠0 ≠0 0 0 0 0 0 0 0 0
    33 - 47 0x21-0x2F !"#$%&'()*+,-./ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
    48 - 57 0x30-0x39 0123456789 0 ≠0 0 0 ≠0 0 ≠0 0 0 0 ≠0 ≠0
    58 - 64 0x3a-0x40 :;<=>?@ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
    65 - 70 0x41-0x46 ABCDEF 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 ≠0
    71 - 90 0x47-0x5A GHIJKLMNOPQRSTUVWXYZ 0 ≠0 0 0 ≠0 0 ≠0 ≠0 ≠0 0 0 0
    91 - 96 0x5B-0x60 [\]^_` 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
    97 -102 0x61-0x66 abcdef 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 ≠0
    103-122 0x67-0x7A ghijklmnopqrstuvwxyz 0 ≠0 0 0 ≠0 0 ≠0 ≠0 0 ≠0 0 0
    123-126 0x7B-0x7E {|}~ 0 ≠0 0 0 ≠0 ≠0 0 0 0 0 0 0
    127 0x7F backspace character (DEL) ≠0 0 0 0 0 0 0 0 0 0 0 0