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<a name="vfprintf_002c-vprintf_002c-vsprintf_002c-vsnprintf_002c-vasprintf_002c-vasnprintf_002d_002d_002dformat-argument-list"></a>
<h3 class="section">4.70 <code>vfprintf</code>, <code>vprintf</code>, <code>vsprintf</code>, <code>vsnprintf</code>, <code>vasprintf</code>, <code>vasnprintf</code>—format argument list</h3>
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<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include <stdio.h>
#include <stdarg.h>
int vprintf(const char *<var>fmt</var>, va_list <var>list</var>);
int vfprintf(FILE *<var>fp</var>, const char *<var>fmt</var>, va_list <var>list</var>);
int vsprintf(char *<var>str</var>, const char *<var>fmt</var>, va_list <var>list</var>);
int vsnprintf(char *<var>str</var>, size_t <var>size</var>, const char *<var>fmt</var>,
va_list <var>list</var>);
int vasprintf(char **<var>strp</var>, const char *<var>fmt</var>, va_list <var>list</var>);
char *vasnprintf(char *<var>str</var>, size_t *<var>size</var>, const char *<var>fmt</var>,
va_list <var>list</var>);
int _vprintf_r(struct _reent *<var>reent</var>, const char *<var>fmt</var>,
va_list <var>list</var>);
int _vfprintf_r(struct _reent *<var>reent</var>, FILE *<var>fp</var>,
const char *<var>fmt</var>, va_list <var>list</var>);
int _vsprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>,
const char *<var>fmt</var>, va_list <var>list</var>);
int _vasprintf_r(struct _reent *<var>reent</var>, char **<var>str</var>,
const char *<var>fmt</var>, va_list <var>list</var>);
int _vsnprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>,
size_t <var>size</var>, const char *<var>fmt</var>, va_list <var>list</var>);
char *_vasnprintf_r(struct _reent *<var>reent</var>, char *<var>str</var>,
size_t *<var>size</var>, const char *<var>fmt</var>, va_list <var>list</var>);
</pre></div>
<p><strong>Description</strong><br>
<code>vprintf</code>, <code>vfprintf</code>, <code>vasprintf</code>, <code>vsprintf</code>, <code>vsnprintf</code>,
and <code>vasnprintf</code> are (respectively) variants of <code>printf</code>,
<code>fprintf</code>, <code>asprintf</code>, <code>sprintf</code>, <code>snprintf</code>, and
<code>asnprintf</code>. They differ only in allowing their caller to pass the
variable argument list as a <code>va_list</code> object (initialized by
<code>va_start</code>) rather than directly accepting a variable number of
arguments. The caller is responsible for calling <code>va_end</code>.
</p>
<p><code>_vprintf_r</code>, <code>_vfprintf_r</code>, <code>_vasprintf_r</code>, <code>_vsprintf_r</code>,
<code>_vsnprintf_r</code>, and <code>_vasnprintf_r</code> are reentrant versions of the
above.
</p>
<br>
<p><strong>Returns</strong><br>
The return values are consistent with the corresponding functions.
</p>
<br>
<p><strong>Portability</strong><br>
ANSI C requires <code>vprintf</code>, <code>vfprintf</code>, <code>vsprintf</code>, and
<code>vsnprintf</code>. The remaining functions are newlib extensions.
</p>
<p>Supporting OS subroutines required: <code>close</code>, <code>fstat</code>, <code>isatty</code>,
<code>lseek</code>, <code>read</code>, <code>sbrk</code>, <code>write</code>.
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