LLVM Compiler 2.0: Warning with "using namespace std;"

Question

In Xcode using LLVM 2.0, when I put the line using namespace std; in my C++ code, I get this warning:

Semantic Issue
Using directive refers to implicitly-defined namespace 'std'

Is there a way to fix this? Why is it giving that warning?

Answer 1

Have you included any standard header files? Otherwise the compiler doesn't know about namespace std.

Please post more code to clarify.

Answer 2

Moving the using namespace std to after the #include can eliminate this warning.