1ISPRINT(3P) POSIX Programmer's Manual ISPRINT(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 isprint - test for a printable character
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15 #include <ctype.h>
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17 int isprint(int c);
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21 The isprint() function shall test whether c is a character of class
22 print in the program's current locale; see the Base Definitions volume
23 of IEEE Std 1003.1-2001, Chapter 7, Locale.
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25 The c argument is an int, the value of which the application shall
26 ensure is a character representable as an unsigned char or equal to the
27 value of the macro EOF. If the argument has any other value, the behav‐
28 ior is undefined.
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31 The isprint() function shall return non-zero if c is a printable char‐
32 acter; otherwise, it shall return 0.
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35 No errors are defined.
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37 The following sections are informative.
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40 None.
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43 To ensure applications portability, especially across natural lan‐
44 guages, only this function and those listed in the SEE ALSO section
45 should be used for character classification.
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48 None.
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51 None.
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54 isalnum(), isalpha(), iscntrl(), isdigit(), isgraph(), islower(),
55 ispunct(), isspace(), isupper(), isxdigit(), setlocale(), the Base Def‐
56 initions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h>
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59 Portions of this text are reprinted and reproduced in electronic form
60 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
61 -- Portable Operating System Interface (POSIX), The Open Group Base
62 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
63 Electrical and Electronics Engineers, Inc and The Open Group. In the
64 event of any discrepancy between this version and the original IEEE and
65 The Open Group Standard, the original IEEE and The Open Group Standard
66 is the referee document. The original Standard can be obtained online
67 at http://www.opengroup.org/unix/online.html .
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71IEEE/The Open Group 2003 ISPRINT(3P)