isprint, iswprint, _isprint_l, _iswprint_l
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Determines whether an integer represents a printable character.
Syntax
int isprint(
int c
);
int iswprint(
wint_t c
);
int _isprint_l(
int c,
_locale_t locale
);
int _iswprint_l(
wint_t c,
_locale_t locale
);
Parameters
c
Integer to test.
locale
The locale to use.
Return Value
Each of these routines returns nonzero if c is a particular representation of a printable character. isprint returns a nonzero value if c is a printable character—this includes the space character (0x20 – 0x7E). iswprint returns a nonzero value if c is a printable wide character—this includes the space wide character. Each of these routines returns 0 if c does not satisfy the test condition.
The result of the test condition for these functions depends on the LC_CTYPE category setting of the locale; see setlocale, _wsetlocale for more information. The versions of these functions that do not have the _l suffix use the current locale for any locale-dependent behavior; the versions that do have the _l suffix are identical except that they use the locale that's passed in instead. For more information, see Locale.
The behavior of isprint and _isprint_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 |
|---|---|---|---|
_ istprint |
isprint |
_ismbcprint | iswprint |
Requirements
| Routine | Required header |
|---|---|
isprint |
<ctype.h> |
iswprint |
<ctype.h> or <wchar.h> |
_isprint_l |
<ctype.h> |
_iswprint_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.