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<h2>
<span class="refentrytitle">divz</span>
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<p>divz —
Safely divides two numbers.
</p>
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<div class="refsect1">
<a id="idm281472941047816"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>divz</strong></span> xa, xb, ksubst</pre>
<pre class="synopsis">ires <span class="command"><strong>divz</strong></span> ia, ib, isubst</pre>
<pre class="synopsis">kres <span class="command"><strong>divz</strong></span> ka, kb, ksubst</pre>
<pre class="synopsis">...<span class="command"><strong>divz</strong></span>(ka, kb, ksubst)... (no rate restriction)</pre>
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<div class="refsect1">
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<h2>Description</h2>
<p>
Safely divides two numbers.
</p>
</div>
<div class="refsect1">
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<h2>Initialization</h2>
<p>
Whenever <span class="emphasis"><em>b</em></span> is not zero, set the result to the value <span class="emphasis"><em>a / b</em></span>; when <span class="emphasis"><em>b</em></span> is zero, set it to the value of <span class="emphasis"><em>subst</em></span> instead.
</p>
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<div class="refsect1">
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<h2>Examples</h2>
<p>
Here is an example of the divz opcode. It uses the file <a class="ulink" href="examples/divz.csd" target="_top"><em class="citetitle">divz.csd</em></a>.
</p>
<div class="example">
<a id="idm281472940973368"></a>
<p class="title">
<strong>Example 219. Example of the divz 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>
<div class="refsect1">
<a id="idm281472773787560"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in</span>
-odac -iadc <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o divz.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; Instrument #1.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Define the numbers to be divided.</span>
k<span class="n">a</span> <span class="nb">init</span> <span class="mi">200</span>
<span class="c1">; Linearly change the value of kb from 200 to 0.</span>
k<span class="n">b</span> <span class="nb">line</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">200</span>
<span class="c1">; If a "divide by zero" error occurs, substitute -1.</span>
k<span class="n">subst</span> <span class="nb">init</span> <span class="o">-</span><span class="mi">1</span>
<span class="c1">; Safely divide the numbers.</span>
k<span class="n">results</span> <span class="nb">divz</span> k<span class="n">a</span><span class="p">,</span> k<span class="n">b</span><span class="p">,</span> k<span class="n">subst</span>
<span class="c1">; Print out the results.</span>
<span class="nb">printks</span> <span class="s">"%f / %f = %f</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> k<span class="n">a</span><span class="p">,</span> k<span class="n">b</span><span class="p">,</span> k<span class="n">results</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Play Instrument #1 for one second.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">1</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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</div>
</div>
<p><br class="example-break" />
Its output should include lines like:
</p>
<pre class="screen">
200.000000 / 0.000000 = -1.000000
200.000000 / 19.999887 = 10.000056
200.000000 / 40.000027 = 4.999997</pre>
<p>
</p>
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<div class="refsect1">
<a id="idm281472940968296"></a>
<h2>See Also</h2>
<p>
<a class="link" href="assign.html" title="="><em class="citetitle">=</em></a>,
<a class="link" href="init.html" title="init"><em class="citetitle">init</em></a>,
<a class="link" href="tival.html" title="tival"><em class="citetitle">tival</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472940964264"></a>
<h2>Credits</h2>
<p>Author: John ffitch after an idea by Barry L. Vercoe</p>
<p>Example written by Kevin Conder.</p>
<p>Functional form available in csound Version 6.00</p>
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