Correct C++ file extension
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/1545080/correct-c-code-file-extension-cc-vs-cpp">Correct C++ code file extension? .cc vs .cpp</a><br>
  <a href="http://stackoverflow.com/questions/5171502/c-vs-cc-vs-cpp-vs-hpp-vs-h-vs-cxx">.c vs .cc vs. .cpp vs .hpp vs .h vs .cxx</a>  </p>
</blockquote>



<p>I have written C++ code in files with extension <code>.cpp</code>, <code>.cc</code> or <code>.cxx</code></p>

<p>Can anyone explain that what is the difference between these three and which one is the best ( is that platform dependent ) and why?</p>

<p>I am currently working on cygwin.</p>
