Here is some code. There are only two outputs, one a message from the unnamed namespace the other a message from the Savitch namespace. Tell which line generates which message.

Question

```
#include using namespace std; namespace
{
void message();
}
namespace Savitch
{
void message();
}
int main()
{
{
message(); //a)
Savitch::message(); //b)
using Savitch::message;
message(); //c)
}
message(); //d)
return 0;
}

namespace Savitch
{
void message()
{
cout << "Message from NS Savitch\n";
}
}
namespace
{
void message()
{
cout <<"Message from unnamed NS\n";
}
}
```

1) List the letters of the lines that give the message from the unnamed namespace: ____________________
2) List the letters of the lines that give the message from the Savitch namespace: ____________________

Answer 1

1) List the letters of the lines that give the message from the unnamed namespace: __a) and d)____________
2) List the letters of the lines that give the message from the Savitch namespace: __b) and c)____________

a) is a use of message() in a file with an unnamed namespace containing a definition of message(). This is an invocation of the unnamed. namespace function. b) is a use of a qualified name, Savitch::message(). This is a use of the name from the Savitch namespace. c) follows a using declaration of message from the Savitch namespace, that is also a use of message() from that namespace. The block ends, so the using declaration expires, and the next message() is from the unnamed namespace again.