Creating a C++ namespace in header and source (cpp)

Question

Is there any difference between wrapping both header and cpp file contents in a namespace or wrapping just the header contents and then doing using namespace

Answer 1

I think right thing to do here is to use namespace for scoping.

namespace catagory
{
    enum status
    {
      none,
      active,
      paused
    }
};

void func()
{
    catagory::status status;
    status = category::active;
}