/// <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>
/// 取段，自动分析数值或计算符
/// </summary>
/// <returns></returns>
public FormaItem getItem()
{
FormaItem result = new FormaItem();
//结束了
if (iCurr == iCount)
{
result.Name = "";
result.Typ = FormaItemType.EndForma;
return(result);
}
char ChTmp = StrB[iCurr];
if (IsOper(ChTmp))
{
iCurr++;
result.Name = ChTmp.ToString();
result.Typ = FormaItemType.Operator;
return(result);
}
result.Typ = FormaItemType.Number;
StringBuilder strTmp = new StringBuilder();
while (true)
{
// if (char.IsLetterOrDigit(ChTmp) || ChTmp == '.')
if (!char.IsControl(ChTmp) && !char.IsWhiteSpace(ChTmp))
{
strTmp.Append(ChTmp);
if (!IsNum(ChTmp))
{
result.Typ = FormaItemType.Tag;
}
}
iCurr++;
if (iCurr == iCount)
{
break;
}
ChTmp = StrB[iCurr];
if (IsOper(ChTmp))
{
if (strTmp.Length == 0)
{
strTmp.Append(ChTmp);
result.Typ = FormaItemType.Operator;
iCurr++;
}
break;
}
}
result.Name = strTmp.ToString();
if (result.Name == "")
{
result.Typ = FormaItemType.EndForma;
}
return(result);
}
/// <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]);
}
