Referring to previously-defined class in a namespace split acorss files

[abeginner]

I get a syntax error for referring to a previously defined class.


file first.cpp
---------
namespace NS {

class C : public B {
int m;
}


}


file second.cpp
------------------
namespace NS {

B inst = new C(); // ------- Syntax Error: Doesn't recognize "C" from first.cpp.

}


I also used "using namespace NS" in second.cpp with no success.
Does someone know how to resolve this? (I am using Visual C++).

thanks.

[laserlight]

The definition of C should be in a header so that it could be included in second.cpp