Using Namespaces II

Entire namespaces can be pulled in
 namespace  A  {
         int  fred  =  10;
         double  bill  =  10.0;
 }
 int  main()  {
     using  namespace  A;
     std::cout  <<  fred  <<  '  '  <<  bill;
     std::cout  <<  std::endl;
 }