Using Namespaces

It's possible to "pull in" names from a namespace

 namespace  A  {  int  fred  =  10;  }
 int  fred  =  20;
 int  main()  {
         std::cout  <<  fred  <<  std::endl;
         using  A::fred;
         std::cout  <<  fred  <<  std::endl;
         std::cout  <<  A::fred  <<  std::endl;
 }