Standard library header - cppreference.com (original) (raw)
This header was originally in the C standard library as <ctype.h>.
This header is part of the null-terminated byte strings library.
| Functions | |
|---|---|
| isalnum | checks if a character is alphanumeric (function) [edit] |
| isalpha | checks if a character is alphabetic (function) [edit] |
| islower | checks if a character is lowercase (function) [edit] |
| isupper | checks if a character is an uppercase character (function) [edit] |
| isdigit | checks if a character is a digit (function) [edit] |
| isxdigit | checks if a character is a hexadecimal character (function) [edit] |
| iscntrl | checks if a character is a control character (function) [edit] |
| isgraph | checks if a character is a graphical character (function) [edit] |
| isspace | checks if a character is a space character (function) [edit] |
| isblank(C++11) | checks if a character is a blank character (function) [edit] |
| isprint | checks if a character is a printing character (function) [edit] |
| ispunct | checks if a character is a punctuation character (function) [edit] |
| tolower | converts a character to lowercase (function) [edit] |
| toupper | converts a character to uppercase (function) [edit] |
[edit] Synopsis
namespace std { int isalnum(int c); int isalpha(int c); int isblank(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int islower(int c); int isprint(int c); int ispunct(int c); int isspace(int c); int isupper(int c); int isxdigit(int c); int tolower(int c); int toupper(int c); }