#include <iostream>
#include "coin.h"

using namespace std;

// constructors

Coin::Coin()
  : randNumGen(), tossed(false)
{
}

Coin::Coin(int seed)
  : randNumGen(seed), tossed(false)
{
}

// public accessing functions

bool Coin::Heads()
// precondition: coin has been tossed at least once
// postcondition: returns true if last toss turned up heads
{  
  if ( tossed )
  	 return showingHeads;
}

bool Coin::Tails()
// precondition: coin has been tossed at least once
// postcondition: returns true if last toss turned up tails
{  
  if ( tossed )
  	 return not showingHeads;
}

// public modifying functions

void Coin::Toss()
// postcondition: 50/50 chance that Heads is true
{  
  tossed = true;
  showingHeads = (randNumGen.RandInt(0, 1) == 1);
}