/// <summary>
/// ���췽��
/// </summary>
/// <param name="str">��ʽ</param>
public Arithmetic(string str)
{
//
// TODO: �ڴ˴���ӹ��캯����
//
HList = new ArrayList();
Vlist = new ArrayList();
of = new OperFactory();
cu = new CalUtility(str);
}
/// <summary>
/// 构造方法
/// </summary>
/// <param name="str">算式</param>
public Arithmetic(string str)
{
//
// TODO: 在此处添加构造函数逻辑
//
HList = new ArrayList();
Vlist = new ArrayList();
of = new OperFactory();
cu = new CalUtility(str);
}