=E6=98=8E=E8=A6=BA: > > thanks, but before I got the benifit of so many languages, I have been > tired of learning them, maybe it cannot be called "learning", it's > just some parallel memory, for none of them bring new concepts to > C/C++. This is plain wrong. How do you do closures in C/C++? What about higher order functions, pattern matching, dynamic typing? How do you even dare to complain about SQL (in another post of yours), if your only complaint is that it is unlike C in some respects? SQL (without stored procedures) is not even turing complete! If you already know the terms I mentioned and still think they don't add anything to what's already in C/C++ then you didn't understand them. J.