| ASCII 值 | 字符 | iscntrl | isblank | isspace | isupper | islower | isalpha | isdigit | isxdigit | isalnum | ispunct | isgraph | isprint |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x00 .. 0x08 | NUL, (其他控制码) | x | |||||||||||
| 0x09 | 制表符 ('\t') | x | x | x | |||||||||
| 0x0A .. 0x0D | (空白控制码'\f','\v','\n','\r') | x | x | ||||||||||
| 0x0E .. 0x1F | (其他控制码) | x | |||||||||||
| 0x20 | 空格 (' ') | x | x | x | |||||||||
| 0x21 .. 0x2F | !"#$%&'()*+,-./ | x | x | x | |||||||||
| 0x30 .. 0x39 | 0123456789 | x | x | x | x | x | |||||||
| 0x3a .. 0x40 | :;<=>?@ | x | x | x | |||||||||
| 0x41 .. 0x46 | ABCDEF | x | x | x | x | x | x | ||||||
| 0x47 .. 0x5A | GHIJKLMNOPQRSTUVWXYZ | x | x | x | x | x | |||||||
| 0x5B .. 0x60 | [\]^_` | x | x | x | |||||||||
| 0x61 .. 0x66 | abcdef | x | x | x | x | x | x | ||||||
| 0x67 .. 0x7A | ghijklmnopqrstuvwxyz | x | x | x | x | x | |||||||
| 0x7B .. 0x7E | {|}~ | x | x | x | |||||||||
| 0x7F | (DEL) | x |