Node rightnode; //右子ノード
#endregion Fields
#region Constructors
//コンストラクタ(引数：ノードの値)
public Node(string expression)
{
this.expression = expression;
leftnode = null;
rightnode = null;
}
Node node; //親ノード
#endregion Fields
#region Constructors
//コンストラクタ(引数：grid)
public Function(Grid grid, string firstexpression)
{
expression = firstexpression;
this.grid = grid;
node = new Node(expression);
}
//2分木に分解
public bool Parse()
{
int posoprerator = GetOperatorPosition(expression);
if (posoprerator == NOTEXISTS)
{
leftnode = null;
rightnode = null;
return true;
}
else if (posoprerator == BRACKETERROR)
return false;
leftnode = new Node(RemoveBracket(this.expression.Substring(0, posoprerator)));
leftnode.Parse();
rightnode = new Node(RemoveBracket(this.expression.Substring(posoprerator + 1)));
rightnode.Parse();
this.expression = this.expression.Substring(posoprerator, 1);
return (leftnode.expression != "" && rightnode.expression != "");
}
