title: -if and -of command line arguments
body: <p>I have a simple question, I want to process input from a data file, which is going to be passed like this:   </p>
  
  <pre><code>./myprogram -if inputfile -of outputfile 
  </code></pre>
  
  <p>however I for the life of me have no idea what <code>-if</code> or <code>-of</code> are, and searching those terms bring nothing.  Are they something I need to account for using <code>argv</code> and <code>argc</code>?</p>