今天看了一下ctype.h里面的函数，那么图形字符到底有哪洗呢？
ctype.h中的函数用的很少，一般来说都不会用到，当然有一些可以记住，很方便我们写代码，比如isalpha,isdigit等，这两个用的比较多，其他的认识就好，大概记一下，现在的编译器都会自动为你填充函数，你可以自己选择
我只想知道相关的知识？
Unicode官网 http://www.unicode.org/
正则表达式速查 正则表达式举例 正则表达式学习 (4页A4纸) http://download.csdn.net/detail/zhao4zhong1/1808549
isgraph, iswgraph
int isgraph( int c );
int iswgraph( wint_t c );
Each of these routines returns true if c is a particular representation of a printable character other than a space.
Routine Required Header Compatibility
isgraph <ctype.h> ANSI, Win 95, Win NT
iswgraph <ctype.h> or <wchar.h> ANSI, Win 95, Win NT
For additional compatibility information, see Compatibility in the Introduction.
Libraries
LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version
Return Value
isgraph returns a non-zero value if c is a printable character other than a space. iswgraph returns a non-zero value if c is a printable wide character other than a wide-character space. Each of these routines returns 0 if c does not satisfy the test condition.
The result of the test condition for the isgraph function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For iswgraph, the result of the test condition is independent of locale.
Parameter
c
Integer to test
Generic-Text Routine Mappings
TCHAR.H Routine _UNICODE & _MBCS Not Defined _MBCS Defined _UNICODE Defined
_istgraph isgraph _ismbcgraph iswgraph
Character Classification Routines | Locale Routines | is, isw Function Overview