//--- Demonstration of dereferencing pointers
//    -- augmented version of example Fig2-5.cpp from Nyhoff, 
//       "ADTs, Data Structures and Problem Solving with C++"

#include <iostream>
using namespace std;

int main()
{
  int i = 11, 
      j = 22;
  double d = 3.3, 
         e = 4.4;
                     // Declare pointer variables that:
  int * iPtr,        //    store addresses of ints
      * jPtr;
  double * dPtr,     //    store addresses of doubles 
         * ePtr;
  iPtr = &i;         // value of iPtr is address of i
  jPtr = &j;         // value of jPtr is address of j
  dPtr = &d;         // value of dPtr is address of d
  ePtr = &e;         // value of ePtr is address of e

  cout << "\nAt address " << iPtr
       << ", the value " << *iPtr << " is stored.\n"
       << "\nAt address " << jPtr
       << ", the value " << *jPtr << " is stored.\n"
       << "\nAt address " << dPtr
       << ", the value " << *dPtr << " is stored.\n"
       << "\nAt address " << ePtr
       << ", the value " << *ePtr << " is stored.\n";
       
  // ------------------------------------------------
  // NEW STUFF -----------------------------------RJI
  // ------------------------------------------------
  
  int *pInt = new int;          // DYNAMIC ALLOCATION OF NEW int
  double *pDouble = new double; // DYNAMIC ALLOCATION OF NEW double
 
  *pInt = 55;
  *pDouble = 6.6;
  cout << "----------------------------------------\n";
  cout << "At address " << pInt
       << ", the value " << *pInt << " is stored.\n"
       << "\nAt address " << pDouble 
       << ", the value " << *pDouble << " is stored.\n";
       
  delete pInt;             // RETURN ALLOC'D int SPACE TO HEAP
  delete pDouble;          // RETURN ALLOC'D double SPACE TO HEAP

}