// Fig. E.4: figE_04.cpp
// Using the exit and atexit functions 
#include <iostream>
using std::cout;
using std::endl;
using std::cin;

#include <cstdlib>
using std::atexit;
using std::exit;

void print();

int main()
{
   atexit( print ); // register function print

   cout << "Enter 1 to terminate program with function exit" 
        << "\nEnter 2 to terminate program normally\n";

   int answer;
   cin >> answer;

   // exit if answer is 1
   if ( answer == 1 )
   {
      cout << "\nTerminating program with function exit\n";
      exit( EXIT_SUCCESS );
   }  // end if

   cout << "\nTerminating program by reaching the end of main"
        << endl;

   return 0;
}  // end main

// display message before termination                         
void print()                                                  
{                                                             
   cout << "Executing function print at program termination\n"
        << "Program terminated" << endl;                      
}  // end function print                                      

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