coin.h  From Astrachan, p 334
-----------------------------
#ifndef _COIN_H
#define _COIN_H

//  class for simulating a coin (object "tossed" to generate
//                               a random number 0 or 1)
//
//  Coin() -- constructor
//
//  FlipValue Flip() -- returns the random "flip" of the coin,
//                      either heads or tails with equal probability
//    
//  int NumFlips() -- access function, returns # of times Flip called
//                    for an instance of the class    

#include "dice.h"

enum FlipValue {heads,tails};         // possible coin flip outcomes
    
class Coin
{
  public:
    Coin();                    // constructor
    FlipValue Flip();          // return the random flip
    int NumFlips();            // # times this coin flipped    
  private:
      Dice myDie;              // will be a two-sided die
};

#endif    // _COIN_H not defined