isgraph - test for visible character

Syntax

#include <ctype.h> int isgraph(int c);

Description isgraph() tests whether c is a character with a visible representation, i.e. an alphanumeric

	or a special character. Spaces are not considered to be visible. In all cases, the argument c is an int, the value of which must be representable as an unsigned char or must equal the value of the macro EOF. If the argument c has any other value, the behavior is undefined.
Return val.	!= 0 0	Character with a visible representation Not a character with a visible representation
Notes	isgraph() is implemented both as a function and as a macro. To generate a function call, the definition of the macro name must be first undefined (#undef isgraph). The behavior of isgraph() is determined by the class graph of the current locale. The current locale is the C locale, unless it was explicitly changed using setlocale().
See also	isalnum(), isalpha(), iscntrl(), isdigit(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit(), setlocale(), ctype.h.