Simple string concatenation
<p>If I have a string <code>x='wow'</code> in Python, I can concatenate this string with itself using the <code>__add__</code> function, like so:</p>

<pre><code>x='wow'  
x.__add__(x)  
'wowwow'
</code></pre>

<p>How can I do this in C++?</p>
