Unnamed Namespace

Question

Do you think the following C++ program will compile ? If yes, then will it execute without any errors ? It yes, then what is the output on the screen ?

// Replace [ with less than symbol
// Replace ] with greater than symbol

#include [iostream]

using namespace std;

namespace {
 void hi()
 {
  cout [[ "Hello from unnamed namespace\n";
 }
}

class A
{
 public :
        A() 
        { 
                hi; 
                hi(); 
        }

};

int main()
{
 A a;
  return 0;
}

Answer