Can someone explain this to me?
<p>Ok I'm sure this will get closed as its probably not a real question, but before that happens, I'm really curious on something: <a href="http://stackoverflow.com/questions/5508110/why-is-this-program-erroneously-rejected-by-three-c-compilers">Why is this program erroneously rejected by three C++ compilers?</a></p>

<p>I'm just now taking a data structures and algorithms course, so I'm not really skilled in C++ and have only dealt with basic stuff, so I have no idea what the above joke is all about. Its gotten so many votes and people said they couldnt stop laughing, but I dont get it at all. Can someone explain this? </p>
