protected override bool Resolve(Trouble trouble)
{
if (trouble.Difficulty % 2 == 1)
{
return(true);
}
return(false);
}
public void SupportTrouble(Trouble trouble)
{
/*递归*/
//if (Resolve(trouble))
//{
// Done(trouble);
//}
//else if(Next != null)
//{
// Next.SupportTrouble(trouble);
//}
//else
//{
// Fail(trouble);
//}
/*迭代*/
Support current = this;
do
{
if (current.Resolve(trouble))
{
current.Done(trouble);
break;
}
else if (current.Next != null)
{
current = current.Next;
}
else
{
current.Fail(trouble);
break;
}
} while (true);
}
protected void Fail(Trouble trouble)
{
Console.WriteLine(trouble.ToString() + " cannot be resolved.");
}
protected void Done(Trouble trouble)
{
Console.WriteLine(trouble.ToString() + " is resolved by " + ToString() + ".");
}
protected abstract bool Resolve(Trouble trouble);
protected override bool Resolve(Trouble trouble)
{
return(false);
}