1<html lang="en"> 2<head> 3<title>Varargs - 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="Arglists.html#Arglists" title="Arglists"> 9<link rel="prev" href="Stdarg.html#Stdarg" title="Stdarg"> 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="Varargs"></a> 28<p> 29Previous: <a rel="previous" accesskey="p" href="Stdarg.html#Stdarg">Stdarg</a>, 30Up: <a rel="up" accesskey="u" href="Arglists.html#Arglists">Arglists</a> 31<hr> 32</div> 33 34<h3 class="section">13.2 Traditional macros, <samp><span class="file">varargs.h</span></samp></h3> 35 36<p>If your C compiler predates ANSI C, you may still be able to use 37variable argument lists using the macros from the <samp><span class="file">varargs.h</span></samp> 38header file. These macros resemble their ANSI counterparts, but have 39important differences in usage. In particular, since traditional C has 40no declaration mechanism for variable argument lists, two additional 41macros are provided simply for the purpose of defining functions with 42variable argument lists. 43 44 <p>As with <samp><span class="file">stdarg.h</span></samp>, the type <code>va_list</code> is used to hold a data 45structure representing a variable argument list. 46 47<ul class="menu"> 48<li><a accesskey="1" href="va_005falist.html#va_005falist">va_alist</a> 49<li><a accesskey="2" href="va_005fstart_002dtrad.html#va_005fstart_002dtrad">va_start-trad</a> 50<li><a accesskey="3" href="va_005farg_002dtrad.html#va_005farg_002dtrad">va_arg-trad</a> 51<li><a accesskey="4" href="va_005fend_002dtrad.html#va_005fend_002dtrad">va_end-trad</a> 52</ul> 53 54 </body></html> 55 56