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    isalnum

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    < c | string | byte
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    <metanoindex/>

     
    C
     
    Strings Bibliothek
     
    Null-terminierte Byte-Strings
    Funktionen
    Original:
    Functions
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    Character Manipulation
    Original:
    Character manipulation
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    Umwandlungen in numerische Formate
    Original:
    Conversions to numeric formats
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    String-Manipulation
    Original:
    String manipulation
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    strcpy
    strncpy
    strcat
    strncat
    strxfrm
    String Prüfung
    Original:
    String examination
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    Speicher Manipulation
    Original:
    Memory manipulation
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    memchr
    memcmp
    memset
    memcpy
    memmove
    Verschiedenes
    Original:
    Miscellaneous
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    strerror
     
    <tbody> </tbody>
    definiert in Header <ctype.h>
    int isalnum( int ch );
    Prüft, ob die angegebene Zeichen ist ein alphanumerisches Zeichen entsprechend der aktuellen C locale, also entweder eine Zahl (0123456789 im Standardgebietsschema), ein Großbuchstabe (ABCDEFGHIJKLMNOPQRSTUVWXYZ im Standardgebietsschema) oder ein Kleinbuchstabe (abcdefghijklmnopqrstuvwxyz im Standardgebietsschema) .
    Original:
    Checks if the given character is an alphanumeric character according to the current C locale, i.e. either a number (0123456789 in the default locale), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ in the default locale), or a lowercase letter (abcdefghijklmnopqrstuvwxyz in the default locale).
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    Parameter

    ch -
    Charakter
    Original:
    character
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    Rückgabewert

    Nicht-Null-Wert (true), wenn das Zeichen für ein alphanumerisches Zeichen ist, 0 (false) ansonsten .
    Original:
    Non-zero value (true) if the character is an alphanumeric character, 0 (false) otherwise.
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    Siehe auch
    prüft, ob eine breite Zeichen alphanumerisch
    Original:
    checks if a wide character is alphanumeric
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    (Funktion) [edit]
    C++ documentation for isalnum
    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