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swap [C++ Reference]
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<h2><a name="swap" id="swap">swap</a></h2>
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<p>
Syntax:
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<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <string></span>
<span class="kw4">void</span> swap<span class="br0">(</span> string<span class="sy0">&</span> from <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The swap() function exchanges the elements of the current string with those of
from. This function operates in <a href="../complexity.html" class="wikilink1" title="complexity">constant time</a>.
For example, the following code uses the swap() function to exchange the values
of two strings:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">string</span> first<span class="br0">(</span> <span class="st0">"This comes first"</span> <span class="br0">)</span><span class="sy0">;</span>
<span class="kw4">string</span> second<span class="br0">(</span> <span class="st0">"And this is second"</span> <span class="br0">)</span><span class="sy0">;</span>
first.<span class="me1">swap</span><span class="br0">(</span> second <span class="br0">)</span><span class="sy0">;</span>
<p>
The above code displays:
</p>
<pre class="c code c++" style="font-family:monospace;"> And this is second
This comes first</pre>
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