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Functions | |
| bool | isalnum (char c) |
| bool | isalpha (char c) |
| bool | iscntrl (char c) |
| bool | isdigit (char c) |
| bool | isgraph (char c) |
| bool | islower (char c) |
| bool | isprint (char c) |
| bool | ispunct (char c) |
| bool | isspace (char c) |
| bool | isupper (char c) |
| bool | isxdigit (char c) |
| char | tolower (char c) |
| char | toupper (char c) |
| int | digit_value (char c) |
| int | xdigit_value (char c) |
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