const pointer return the reference
<p>I have a singleton class with a variable that every other class instance is going to use. 
Now I want to put a function in my singleton class, say "GetReference".</p>

<ol>
<li>Is it possible to return a reference to a variable? If so, how can I return the reference to the variable?</li>
<li>How do I make others only use and not modify or delete the variable. Will <code>const</code> work for my case?</li>
</ol>
