1<html lang="en"> 2<head> 3<title>isprint - Untitled</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Untitled"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Ctype.html#Ctype" title="Ctype"> 9<link rel="prev" href="islower.html#islower" title="islower"> 10<link rel="next" href="ispunct.html#ispunct" title="ispunct"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<meta http-equiv="Content-Style-Type" content="text/css"> 13<style type="text/css"><!-- 14 pre.display { font-family:inherit } 15 pre.format { font-family:inherit } 16 pre.smalldisplay { font-family:inherit; font-size:smaller } 17 pre.smallformat { font-family:inherit; font-size:smaller } 18 pre.smallexample { font-size:smaller } 19 pre.smalllisp { font-size:smaller } 20 span.sc { font-variant:small-caps } 21 span.roman { font-family:serif; font-weight:normal; } 22 span.sansserif { font-family:sans-serif; font-weight:normal; } 23--></style> 24<link rel="stylesheet" type="text/css" href="../cs.css"> 25</head> 26<body> 27<div class="node"> 28<a name="isprint"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="ispunct.html#ispunct">ispunct</a>, 31Previous: <a rel="previous" accesskey="p" href="islower.html#islower">islower</a>, 32Up: <a rel="up" accesskey="u" href="Ctype.html#Ctype">Ctype</a> 33<hr> 34</div> 35 36<h3 class="section">3.7 <code>isprint</code>, <code>isgraph</code>—printable character predicates</h3> 37 38<p><a name="index-isprint-116"></a><a name="index-isgraph-117"></a><strong>Synopsis</strong> 39<pre class="example"> #include <ctype.h> 40 int isprint(int <var>c</var>); 41 int isgraph(int <var>c</var>); 42 43</pre> 44 <p><strong>Description</strong><br> 45<code>isprint</code> is a macro which classifies ASCII integer values by table 46lookup. It is a predicate returning non-zero for printable 47characters, and 0 for other character arguments. 48It is defined only when <code>isascii</code>(<var>c</var>) is true or <var>c</var> is EOF. 49 50 <p>You can use a compiled subroutine instead of the macro definition by 51undefining either macro using `<code>#undef isprint</code>' or `<code>#undef isgraph</code>'. 52 53 <p><br> 54<strong>Returns</strong><br> 55<code>isprint</code> returns non-zero if <var>c</var> is a printing character, 56(<code>0x20</code>–<code>0x7E</code>). 57<code>isgraph</code> behaves identically to <code>isprint</code>, except that the space 58character (<code>0x20</code>) is excluded. 59 60 <p><br> 61<strong>Portability</strong><br> 62<code>isprint</code> and <code>isgraph</code> are ANSI C. 63 64 <p>No supporting OS subroutines are required. 65 66 <p><br> 67 68 </body></html> 69 70