cpp using namespace code example

Example 1: using namespace std in c++

#include 

using namespace std;

int main()
{
    cout << "Hello World";
    system("pause");
    return 0;
    
}

Example 2: c++ custom namespace

//using namespaces
using namespace std;

//creating namespaces
namespace custom{
  class example{
    public:
    	static int method(){
          return 0;
        }
  };
};

//using custom namespaces
using namespace custom;

Example 3: namespace c++

Namespace std::cout or cout <<

Example 4: access the namespace members using namespace member function

namespace Parent
{
    inline namespace new_ns
    {
         template 
         struct C
         {
             T member;
         };
    }
     template<>
     class C {};
}