1<html lang="en"> 2<head> 3<title>strncat - 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="Strings.html#Strings" title="Strings"> 9<link rel="prev" href="strncasecmp.html#strncasecmp" title="strncasecmp"> 10<link rel="next" href="strncmp.html#strncmp" title="strncmp"> 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="strncat"></a> 29<p> 30Next: <a rel="next" accesskey="n" href="strncmp.html#strncmp">strncmp</a>, 31Previous: <a rel="previous" accesskey="p" href="strncasecmp.html#strncasecmp">strncasecmp</a>, 32Up: <a rel="up" accesskey="u" href="Strings.html#Strings">Strings</a> 33<hr> 34</div> 35 36<h3 class="section">5.29 <code>strncat</code>—concatenate strings</h3> 37 38<p><a name="index-strncat-397"></a><strong>Synopsis</strong> 39<pre class="example"> #include <string.h> 40 char *strncat(char *<var>dst</var>, const char *<var>src</var>, size_t <var>length</var>); 41 42</pre> 43 <p><strong>Description</strong><br> 44<code>strncat</code> appends not more than <var>length</var> characters from 45the string pointed to by <var>src</var> (including the terminating 46null character) to the end of the string pointed to by 47<var>dst</var>. The initial character of <var>src</var> overwrites the null 48character at the end of <var>dst</var>. A terminating null character 49is always appended to the result 50 51 <p><br> 52<strong>Warnings</strong><br> 53Note that a null is always appended, so that if the copy is 54limited by the <var>length</var> argument, the number of characters 55appended to <var>dst</var> is <code>n + 1</code>. 56 57 <p><br> 58<strong>Returns</strong><br> 59This function returns the initial value of <var>dst</var> 60 61 <p><br> 62<strong>Portability</strong><br> 63<code>strncat</code> is ANSI C. 64 65 <p><code>strncat</code> requires no supporting OS subroutines. 66 67 <p><br> 68 69 </body></html> 70 71