#include iostreamusing namespace std;// first name spacenamespace first_space {void func() {cout Inside first_space endl;

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#include <iostream>

using namespace std;

// first name space
namespace first_space {
   voID func() {
      cout << "InsIDe first_space" << endl;
   }
}

// second name space
namespace second_space {
   voID func() {
      cout << "InsIDe second_space" << endl;
   }
}

using namespace first_space;
int main () {
   // This calls function from first name space.
   func();

   return 0;
}