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isalnum

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< c‎ | string‎ | byte

 
 
 
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
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String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
String Prüfung
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String examination
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Speicher Manipulation
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Verschiedenes
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Miscellaneous
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strerror
 
Defined 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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[Bearbeiten] Parameter

ch -
Charakter
Original:
character
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[Bearbeiten] 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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[Bearbeiten] 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