The authors of the PVS-Studio analyzer invite you to test your attentiveness: <a href="http://www.viva64.com/en/b/0280/" rel="nofollow">http://www.viva64.com/en/b/0280/</a> :)<p>Code analyzers never get tired and can find errors a human's eye cannot easily notice. We have picked a few code fragments with errors revealed by PVS-Studio, all the fragments taken from well-known open-source projects.