/*
 *   demobyref.cpp
 *   demonstration of passing by reference
 *   CIS 250
 *   David Klick
 *   1/30/06
 *
 */

#include <iostream>

void change1(int);
void change2(int *);

int main(void) {
   using std::cout;
   using std::endl;

   int x = 0;
   cout << "Before calling functions: " << x << '\n';
   change1(x);
   cout << "After change1() function: " << x << '\n';
   change2(&x);
   cout << "After change2() function: " << x << '\n';

   return 0;
}

void change1(int n) {
   n = 1;
}

void change2(int *n) {
   *n = 2;
}
/*
   Sample output:

   Before calling functions: 0
   After change1() function: 0
   After change2() function: 2
*/