#include <iostream.h>

  int main(int argc, char *argv[])
  {
     int x, y;
     void f(int *, int *);    // This declaration says that the
			      // the parameters are of the type
			      // "reference" to integer variables
			      // The param passing mechanism used in
			      // by VALUE !!!

     x = 10;
     y = 100;

     cout << "Address of x = " << (unsigned int) &x 
	  << ", address of y = " << (unsigned int) &y << "\n";

     cout << "Before f(x,y), x = " << x << ", y = " << y << "\n\n";

     f(&x, &y);			// This passes the ADDRESS of x and y
				// by VALUE to f

     cout << "After f(x,y), x = " << x << ", y = " << y << "\n";
  }

  void f(int* a, int* b)
  {
     cout << "Address of a = " << (unsigned int) &a 
	  << ", address of b = " << (unsigned int) &b << "\n";

     cout << "Value of a = " << (unsigned int) a 
	  << ", value of b = " << (unsigned int) b << "\n";

     cout << "Before increment *a = " << *a << ", *b = " << *b << "\n\n";

     *a = *a + 10000;
     *b = *b + 10000;

     cout << "After increment *a = " << *a << ", *b = " << *b << "\n";
     cout << "Value of a = " << (unsigned int) a 
	  << ", value of b = " << (unsigned int) b << "\n\n";
  }