// Mr. Minich
// Computer Science Using C++
// Ch. 9 Demo Program #6
// January 30, 2000 
// Purpose - to illustrate the difference between passing by value and passing by reference.

#include <iostream.h>

void permanentChange(int & aValue);   // demonstrates passing by reference
void nonPermanentChange(int aValue);  // demonstrates passing by value 
   
int main()
{
   int original = 10;	// used to demonstrate difference between passing by value and
                        //    passing by reference

   nonPermanentChange(original);     // Notice that you cannot tell from the call statement
   cout << original << endl;         //    if the argument is being passed by value or by
                                     //    reference
   permanentChange(original);
   cout << original << endl;
   
   return 0;
}// end of main

void permanentChange(int & incoming)
{
   incoming = 300;
}// end of permanentChange

void nonPermanentChange(int incoming)
{
   incoming = 8000000;
}// end of nonPermanentChange