title: How to compare a revision to its previous revision using CVS diff?
body: <p>I am currently analyzing some CVS projects. Suppose I want to compare Foo.c (revision 5) to its previous revision (revision 4) and output the diff, can I use CVS diff to achieve this? (No working copy involved)</p>
  
  <p>I know that SVN diff has an option --change(-c) that can achieve this, a command like:</p>
  
  <pre><code>$ svn diff -c 5 Foo.c
  </code></pre>
  
  <p>can automatically compare revision 5 of Foo.c to its previous revision.</p>
  
  <p>I just wonder whether CVS diff has similar options. Thanks!</p>