// ==========================================================================
// $Id: element_access.cpp,v 1.5 2014/09/13 19:48:03 jlang Exp $
// CSI2372 example Code for lecture 3
// ==========================================================================
// (C)opyright:
//
//   Jochen Lang
//   SITE, University of Ottawa
//   800 King Edward Ave.
//   Ottawa, On., K1N 6N5
//   Canada. 
//   http://www.site.uottawa.ca
// 
// Creator: jlang (Jochen Lang)
// Email:   jlang@site.uottawa.ca
// ==========================================================================
// $Log: element_access.cpp,v $
// Revision 1.5  2014/09/13 19:48:03  jlang
// Added C++11 features to lecture 3
//
// Revision 1.4  2011/09/19 20:44:36  jlang
// Added extra example for array name
//
// Revision 1.3  2008/09/13 01:36:53  jlang
// Minor clarifications arrays and operators
//
// Revision 1.2  2007/09/18 00:24:50  jlang
// Added comments
//
// Revision 1.1  2006/09/11 21:38:36  jlang
// Check-in for lecture 3
//
//
// ==========================================================================
#include <iostream>
#include <iomanip>

using std::cout;
using std::endl;
using std::setw;

int main()
{
  // multi-dim. arrays are arrays of arrays
  // 3D
  int numbers3D[2][3][4]
    {{{0,1,2,3},
      {4,5,6,7},
      {8,9,10,11}},
     {{12,13,14,15},
      {16,17,18,19},
      {20,21,22,23}}};
  // 2D
  int numbers[3][4]
    {{0,1,2,3},
     {4,5,6,7},
     {8,9,10,11}};

  // element access in 3D 
  int element = numbers3D[1][2][0];
  cout << element << endl;

  // array with 4 integers is a row
  // get a pointer to array of ints
  int (*row)[4] = &numbers[1];
  // 3rd element in row 1 -- parantheses!
  // It is not the same as *(row[3])or *row[3] 
  int elementA = (*row)[3];
  cout << "elementA: " << elementA << endl;
  // Access via address of elements
  int* elementB = &numbers[0][2];
  cout << "elementB: " << *elementB << endl;
  int* elementC = &numbers[0][1];
  cout << "elementC: " << *elementC << endl;
  int* elementD = numbers[1];
  cout << "elementD: " << *elementD << endl;
  // Array name is a const ptr
  int (*start)[4] = numbers;
  cout << "(*start)[1]: " << (*start)[1]
       << "\t *(*start+1): " << *(*start+1) 
       << "\t  or start[0][1]: " << start[0][1] 
       << endl; 
  return 0;
}