/// <summary>
/// Play round, return the winner. If the round is a tie or invalid input is find, retur null
/// </summary>
/// <returns>The winner, null if there's no winner</returns>
private Player PlayRound()
{
Play play1 = _player1.GetPlay();
Play play2 = _player2.GetPlay();
if (play1 == Play.Invalid || play2 == Play.Invalid)
{
Console.WriteLine("Invalid input");
return(null);
}
int winner = GetWinner(play1, play2);
if (winner == 0)
{
Console.WriteLine("Nobody wins");
return(null);
}
else if (winner == -1)
{
return(_player1);
}
else
{
return(_player2);
}
}