title: What does someArray[--n] mean?
body: <p>I tried googling this but Google doesn't handle "--n" well. I saw this in my professor's code:</p>
  
  <pre><code>f[--n];
  f[n++];
  </code></pre>
  
  <p>where f is an array of double values.</p>
  
  <p>My guess is that it returns the value of f[n] before reducing (or adding) to n.</p>