/// <summary>
/// 开始计算
/// </summary>
public object DoCal(string str)
{
HList.Clear();
Vlist.Clear();
cu = new CalUtility(str);
FormaItem formaItem = cu.getItem();
while (true)
{
if (formaItem.Typ == FormaItemType.Number)
{
//如果是数值，则写入数据栈
Vlist.Add(formaItem.Name);
}
else if (formaItem.Typ == FormaItemType.Operator)
{
//数值
Cal(formaItem.Name);
}
else if (formaItem.Typ == FormaItemType.Tag)
{
Vlist.Add(model.GetTagValue(formaItem.Name).ToString());
}
else
{
Cal("");
break;
}
formaItem = cu.getItem();
}
return(Vlist[0]);
}
/// <summary>
/// 开始计算
/// </summary>
public object DoCal(string str)
{
/// 算术符栈
ArrayList HList = new ArrayList();
/// 数值栈
ArrayList Vlist = new ArrayList();
//读算试工具
CalUtility cu = new CalUtility(str);
FormaItem formaItem = cu.getItem();
while (true)
{
if (formaItem.Typ == FormaItemType.Number)
{
//如果是数值，则写入数据栈
Vlist.Add(formaItem.Name);
}
else if (formaItem.Typ == FormaItemType.Tag)
{
Vlist.Add(GetTagValue(formaItem.Name).ToString());
}
else
{
string opStr = formaItem.Name;
while (HList.Count > 0)
{
//比较优先级
if (of.MoreThen(HList[HList.Count - 1].ToString(), opStr))
{
if (HList[HList.Count - 1].ToString().Equals("("))
{
if (opStr.Equals(")")) //符号是否可以对消？
{
HList.RemoveAt(HList.Count - 1);
if (HList.Count > 0)
{
opStr = HList[HList.Count - 1].ToString();
HList.RemoveAt(HList.Count - 1);
}
}
else
{
break;
}
}
else
{
//如果新来操作符优先级低，则计算前面的运算符
IOper p = of.CreateOper(HList[HList.Count - 1].ToString());
if (p != null)
{
Vlist[Vlist.Count - 2] = p.Oper(Vlist[Vlist.Count - 2], Vlist[Vlist.Count - 1]);
HList.RemoveAt(HList.Count - 1);
Vlist.RemoveAt(Vlist.Count - 1);
}
else
{
break;
}
}
}
else
{
break;
}
}
if (!opStr.Equals(""))
{
HList.Add(opStr);
}
else
{
break;
}
}
formaItem = cu.getItem();
}
return(Vlist[0]);
}