//
// Filename:      pgm3_6a.cpp
//
// Description:   Demo program, References versus Pass by Value #1
//
// ENSC 104:      Digital Computer Programming
//
// Instructor:    Dr. Walsh
//
// Section:       2
//
// Date Created:  03/17/98
// Last Modified: 03/17/98
//
// Name:          N/A
//

#include <iostream.h>

void passByReference( int & choice );
void passByValue( int choice );

main()
   {
   int choice = -1;

   cout << "**** PASSING BY VALUE ****\n";   
   cout << "before 'passByValue()', choice is " << choice << endl;
   passByValue( choice );
   cout << "after 'passByValue()', choice is " << choice << endl << endl;

   cout << "**** PASSING BY REFERENCE ****\n";   
   choice = -1;
   cout << "before 'passByReference()', choice is " << choice << endl;
   passByReference( choice );
   cout << "after 'passByReference()', choice is " << choice << endl;

   return 0;
   }

// pass by reference method
void passByReference( int & x )
   {
   cout << "\tinside 'passByReference()' ...\n";
   cout << "\t x = " << x << endl;
   x += 10;
   cout << "\t x = " << x << endl;   
   }

// return value method
void passByValue( int x )
   {
   cout << "\tinside 'passByValue()' ...\n";
   cout << "\t x = " << x << endl;
   x +=10;
   cout << "\t x = " << x << endl;   
   }