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<h2>
<span class="refentrytitle">sprintfk</span>
</h2>
<p>sprintfk —
printf-style formatted output to a string variable at k-rate.
</p>
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<div class="refsect1" title="Description">
<a id="idp45142504"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>sprintfk</em></span> writes printf-style formatted output to a string variable, similarly to the C function sprintf(). <span class="emphasis"><em>sprintfk</em></span> runs both at initialization and performance time.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp45153048"></a>
<h2>Syntax</h2>
<pre class="synopsis">Sdst <span class="command"><strong>sprintfk</strong></span> Sfmt, xarg1[, xarg2[, ... ]]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp45154104"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>Sfmt</em></span> -- format string, has the same format as in printf() and other similar C functions, except length modifiers (l, ll, h, etc.) are not supported. The following conversion specifiers are allowed:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>d, i, o, u, x, X, e, E, f, F, g, G, c, s</p>
</li>
</ul>
</div>
<p>
</p>
<p>
<span class="emphasis"><em>xarg1, xarg2, ...</em></span> -- input arguments (max. 30) for format, should be i-rate for all conversion specifiers except %s, which requires a string argument. sprintfk also allows k-rate number arguments, but these should still be valid at init time as well (unless sprintfk is skipped with igoto). Integer formats like %d round the input values to the nearest integer.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp45156464"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>Sdst</em></span> -- output string variable
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp45157304"></a>
<h2>Examples</h2>
<p>
Here is an example of the sprintfk opcode. It uses the file <a class="ulink" href="examples/sprintfk.csd" target="_top"><em class="citetitle">sprintfk.csd</em></a>.
</p>
<div class="example">
<a id="idp45158288"></a>
<p class="title">
<strong>Example 791. Example of the sprintfk opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in</span>
-odac -iadc <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o sprintfk.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 48000
<span class="ohdr">ksmps</span> <span class="op">=</span> 16
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="comment">; Example by Jonathan Murphy 2007</span>
<span class="oblock">instr</span> 1
S1 <span class="op">=</span> "1"
S2 <span class="op">=</span> " <span class="op">+</span> 1"
ktrig <span class="opc">init</span> 0
kval <span class="opc">init</span> 2
<span class="octrl">if</span> (ktrig <span class="op">==</span> 1) then
S1 <span class="opc">strcatk</span> S1, S2
kval <span class="op">=</span> kval <span class="op">+</span> 1
<span class="octrl">endif</span>
String <span class="opc">sprintfk</span> "<span class="op">%</span>s <span class="op">=</span> <span class="op">%</span>d", S1, kval
<span class="opc">puts</span> String, kval
ktrig <span class="opc">metro</span> 1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 10
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
Its output should include lines like this:
</p>
<pre class="screen">
1 + 1 = 2
1 + 1 + 1 = 3
1 + 1 + 1 + 1 = 4
1 + 1 + 1 + 1 + 1 = 5
1 + 1 + 1 + 1 + 1 + 1 = 6
1 + 1 + 1 + 1 + 1 + 1 + 1 = 7
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 8
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 9
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 10
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 11
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 = 12</pre>
<p>
</p>
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<div class="refsect1" title="See also">
<a id="idp45190296"></a>
<h2>See also</h2>
<p>
<a class="link" href="sprintf.html" title="sprintf"><em class="citetitle">sprintf</em></a>,
<a class="link" href="puts.html" title="puts"><em class="citetitle">puts</em></a>,
<a class="link" href="strcatk.html" title="strcatk"><em class="citetitle">strcatk</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp45192296"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Istvan Varga</td>
</tr>
<tr>
<td>2005</td>
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<tr>
<td>Example by Jonathan Murphy</td>
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