isgraph, iswgraph, _isgraph_l, _iswgraph_l

项目
06/05/2017

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Determines whether an integer represents a graphical character.

Syntax

int isgraph(  
   int c   
);  
int iswgraph(  
   wint_t c   
);  
int _isgraph_l(  
   int c,  
   _locale_t locale  
);  
int _iswgraph_l(  
   wint_t c,  
   _locale_t locale  
);

Parameters

c
Integer to test.

Return Value

Each of these routines returns nonzero if c is a particular representation of a printable character other than a space. isgraph returns a nonzero value if c is a printable character other than a space. iswgraph returns a nonzero 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 versions of these functions that have the _l suffix use the locale that's passed in instead of the current locale for their locale-dependent behavior. For more information, see Locale.

The behavior of isgraph and _isgraph_l is undefined if c is not EOF or in the range 0 through 0xFF, inclusive. When a debug CRT library is used and c is not one of these values, the functions raise an assertion.

Generic-Text Routine Mappings

TCHAR.H routine	_UNICODE & _MBCS not defined	_MBCS defined	_UNICODE defined
`_istgraph`	`isgraph`	_ismbcgraph	`iswgraph`
`_istgraph_l`	`_isgraph_l`	_ismbcgraph_l	`_iswgraph_l`

Requirements

Routine	Required header
`isgraph`	<ctype.h>
`iswgraph`	<ctype.h> or <wchar.h>
`_isgraph_l`	<ctype.h>
`_iswgraph_l`	<ctype.h> or <wchar.h>

For additional compatibility information, see Compatibility.

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

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