#ifndef _PAIR_H_
#define _PAIR_H_

// The following is the "preferred" way to define constants in
// C++, instead of using #define.  Unfortunately, MSVC cripples
// this approach by treating MAX_PAIR_OCCURRENCES like a variable
// instead of a constant.  This means you can't do
//         static const int MAX_SIZE = 10;
//         int arr[MAX_SIZE];
// Again, you can use #ifdef to avoid this problem, but I've just
// used #define for array size constants elsewhere ...

static const int MAX_PAIR_OCCURRENCES = 1000000;

// A better approach would be to use MAX_INT instead of 1000000, but
// unfortunately MAX_INT is defined in different headers for different
// systems.  We could use #ifdef to check the system type, but it's
// not worth the trouble.


struct PairKey {
  char *cd;
  char *book;
};

struct Pair {
  PairKey key;
  int numOccurrences;
  int heapIndex;
};

#endif