C++ Cctype
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) isalpha checks if a character is alphabetic (function) islower checks if a character is lowercase (function) isupper checks if a character is an uppercase character (function) isdigit checks if a character is a digit (function) isxdigit checks if a character is a hexadecimal character (function) iscntrl checks if a character is a control character (function) isgraph checks if a character is a graphical character (function) isspace checks if a character is a space character (function) isblank (C++11) checks if a character is a blank character (function) isprint checks if a character is a printing character (function) ispunct checks if a character is a punctuation charac...