CPP Tracing 9 (Header Files 3)

#include <iostream>
#include <string>
using namespace std;
namespace gammal{
-int g=200;
-string website="hello gammal tech";
-string returnd(){
--return "welcome in gammal tech";
-}
}
namespace gammal_tech{
-int g=500;
-string website="hi gammal tech";
-string returnd(){
--return "search for gammal tech";
-}
}
using namespace gammal;
int main(){
-cout<<g<<endl;
-cout<<gammal_tech::g<<endl;
-cout<<returnd()<<endl;
}