//-----------------------------------------------------------
//
// cast.cpp
//
// A program to illustrate different forms of casting in C++
//
// Simon Parsons
//
// 8th February 2010
//

//-----------------------------------------------------------
//
//  Libraries etc.

#include <iostream>
using namespace std;

//-----------------------------------------------------------
//
// showSuit
//

void showSuit( int card ) {
  enum suits { diamonds, clubs, hearts, spades } suit;

  // Here we use cast to convert an integer into a "suit"

  suit = static_cast<suits>( card / 13 );

  // Since an enum is basically an integer, we can use it in 
  // a switch.

  switch( suit ) {
  case diamonds: cout << "diamonds"; break;
  case clubs:    cout << "clubs";    break;
  case hearts:   cout << "hearts";   break;
  case spades:   cout << "spades";   break;
  }
  cout << endl;
}


//-----------------------------------------------------------
//
// main
//

int main() {

  double d = 65.6;

  // Casting in the old-fashioned way

  int i = (double)d; // truncates
  char c = (char)i;  // uses ascii table

  cout << "d=" << d << endl;
  cout << "i=" << i << endl;
  cout << "c=" << c << endl;

  // Casting the correct new way

  int j = static_cast<int>(d);
  cout << "j=" << j << endl;

  // Casting a modifiable version of a const.

  const int k = 75;
  int n = const_cast<int&>(k);
  cout << "k=" << k << endl;
  cout << "n=" << n << endl;

  showSuit( 49 );

}

//
// End of main
//
//-----------------------------------------------------------