public decimal EvaluateTree(NewTree tree)
{
Node top = tree.GetTop();
decimal ans = PackNode(top).value.Number ?? 0;
return(ans);
}
//加一棵子樹進來
public void Add(NewTree tree)
{
//如果是第一個數字
if (Root == null)
{
this.Root = tree.Root;
this.CurrentNode = tree.CurrentNode;
}
if (CurrentNode.IsOperator())
{
Node topNode = tree.GetTop();
CurrentNode.RightNode = topNode;
topNode.ParentNode = CurrentNode;
//主樹現有node必須是子樹的頂端
CurrentNode = topNode;
}
}