#ifndef _COMMON_H_
#define _COMMON_H_

// The number of directions an object can move in
const int NUM_DIRECTIONS = 4;

// The directions, enumerated
enum { N, E, S, W };

// A data structure to all the passing of locations
struct Location
{
	int x, y;
};

// A struct for moves by pacmen and ghosts
struct Move
{
	Location from;
	Location to;
};

int xChange (int dir);
int yChange (int dir);

int randomDirection ();

int nextDir (int dir);
int backDir (int dir);
int prevDir (int dir);

int expTen (int p);
int digitVal (char c);

bool coinFlip ();

int randomBetween (int low, int high);

template <class T>
void Swap (T& a, T& b);

#endif