isprint, iswprint, _isprint_l, _iswprint_l
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 (0x20 - 0x7E), including the space character. iswprint returns a nonzero value if c is a printable wide character, including the space wide character. Each of these routines returns 0 if c doesn't satisfy the test condition.
The result of the test condition for these functions depends on the LC_CTYPE category setting of the locale. For more information, see setlocale, _wsetlocale. The versions of these functions that don't 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 isn't EOF or in the range 0 through 0xFF, inclusive. When a debug CRT library is used and c isn't one of these values, the functions raise an assertion.
Generic-text routine mappings
| TCHAR.H routine | _UNICODE and _MBCS not defined |
_MBCS defined |
_UNICODE defined |
|---|---|---|---|
_istprint |
isprint |
_ismbcprint |
iswprint |
Remarks
By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.
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 more compatibility information, see Compatibility.