public static bool IsStrike(Roll roll)
{
return roll.GetPin() == PinNumberRule.GetMax();
}
public static Frame Append(Frame old, Roll roll)
{
List<Roll> tmp = new List<Roll>(old._rolls);
tmp.Add(roll);
return new Frame(old.GetFrameIndex(), tmp);
}
public static bool IsSpare(Roll roll1, Roll roll2)
{
return roll1.GetPin() + roll2.GetPin() == PinNumberRule.GetMax();
}