Chapter 12.2, Problem 13STE

Explanation of Solution

Program:

//Header file

#include <iostream>

//For standard input and output

using namespace std;

//Create namespace "sally"

namespace sally

{

//Function declaration for message()

 void message( );

}

//Create unnamed namespace

namespace

{

 //Function declaration for message()

 void message( );

}

//Main function

int main( )

{

 {

/* Call the message() function for unnamed namespace */

  message( );

/* Call the function message() by "using" directive */

  using sally::message;

  //Call message() function

  message( );

 }

/* Call the message() function for unnamed namespace */

  message( );

 return 0;

}

/* Create function definition of namespace for "message()" function */

namespace sally

{

 /* Function definition for message() */

 void message( )

 {

   /* Display message */

 cout << "Hello from Sally.\n";

 }

}

/* Create function definition of unnamed namespace for "message()" function */

namespace

{

 void message( )

 {

   /* Display message */

 cout << "Hello from unnamed.\n";

 }

}

Explanation:

The given code is used to display the message from “sally” namespace and unnamed namespace...