1<html lang="en"> 2<head> 3<title>clearerr - 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="Stdio.html#Stdio" title="Stdio"> 9<link rel="next" href="diprintf.html#diprintf" title="diprintf"> 10<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 11<meta http-equiv="Content-Style-Type" content="text/css"> 12<style type="text/css"><!-- 13 pre.display { font-family:inherit } 14 pre.format { font-family:inherit } 15 pre.smalldisplay { font-family:inherit; font-size:smaller } 16 pre.smallformat { font-family:inherit; font-size:smaller } 17 pre.smallexample { font-size:smaller } 18 pre.smalllisp { font-size:smaller } 19 span.sc { font-variant:small-caps } 20 span.roman { font-family:serif; font-weight:normal; } 21 span.sansserif { font-family:sans-serif; font-weight:normal; } 22--></style> 23<link rel="stylesheet" type="text/css" href="../cs.css"> 24</head> 25<body> 26<div class="node"> 27<a name="clearerr"></a> 28<p> 29Next: <a rel="next" accesskey="n" href="diprintf.html#diprintf">diprintf</a>, 30Up: <a rel="up" accesskey="u" href="Stdio.html#Stdio">Stdio</a> 31<hr> 32</div> 33 34<h3 class="section">4.1 <code>clearerr</code>—clear file or stream error indicator</h3> 35 36<p><a name="index-clearerr-145"></a><strong>Synopsis</strong> 37<pre class="example"> #include <stdio.h> 38 void clearerr(FILE *<var>fp</var>); 39 40</pre> 41 <p><strong>Description</strong><br> 42The <code>stdio</code> functions maintain an error indicator with each file 43pointer <var>fp</var>, to record whether any read or write errors have 44occurred on the associated file or stream. Similarly, it maintains an 45end-of-file indicator to record whether there is no more data in the 46file. 47 48 <p>Use <code>clearerr</code> to reset both of these indicators. 49 50 <p>See <code>ferror</code> and <code>feof</code> to query the two indicators. 51 52 <p><br> 53<strong>Returns</strong><br> 54<code>clearerr</code> does not return a result. 55 56 <p><br> 57<strong>Portability</strong><br> 58ANSI C requires <code>clearerr</code>. 59 60 <p>No supporting OS subroutines are required. 61 62 <p><br> 63 64 </body></html> 65 66