[C#] 纯文本查看 复制代码
using System;
namespace HelloCsharp.Utilities
{
/// <summary>
/// EnumFormula
/// </summary>
public enum EnumFormula
{
Add,//加号
Dec,//减号
Mul,//乘号
Div,//除号
Sin,//正玄
Cos,//余玄
Tan,//正切
ATan,//余切
Sqrt,//平方根
Pow,//求幂
None,//无
}
/// <summary>
/// FormulaDeal
/// </summary>
public class FormulaDeal
{
static FormulaDeal()
{
}
private double CalculateExpress(string strExpression)
{
string strTemp = "";
string strTempB = "";
string strOne = "";
string strTwo = "";
double ReplaceValue = 0;
while (strExpression.IndexOf("+") != -1 || strExpression.IndexOf("-") != -1
|| strExpression.IndexOf("*") != -1 || strExpression.IndexOf("/") != -1)
{
if (strExpression.IndexOf("*") != -1)
{
strTemp = strExpression.Substring(strExpression.IndexOf("*") + 1, strExpression.Length - strExpression.IndexOf("*") - 1);
strTempB = strExpression.Substring(0, strExpression.IndexOf("*"));
strOne = strTempB.Substring(GetPrivorPos(strTempB) + 1, strTempB.Length - GetPrivorPos(strTempB) - 1);
strTwo = strTemp.Substring(0, GetNextPos(strTemp));
ReplaceValue = Convert.ToDouble(GetExpType(strOne)) * Convert.ToDouble(GetExpType(strTwo));
strExpression = strExpression.Replace(strOne + "*" + strTwo, ReplaceValue.ToString());
}
else if (strExpression.IndexOf("/") != -1)
{
strTemp = strExpression.Substring(strExpression.IndexOf("/") + 1, strExpression.Length - strExpression.IndexOf("/") - 1);
strTempB = strExpression.Substring(0, strExpression.IndexOf("/"));
strOne = strTempB.Substring(GetPrivorPos(strTempB) + 1, strTempB.Length - GetPrivorPos(strTempB) - 1);
strTwo = strTemp.Substring(0, GetNextPos(strTemp));
ReplaceValue = Convert.ToDouble(GetExpType(strOne)) / Convert.ToDouble(GetExpType(strTwo));
strExpression = strExpression.Replace(strOne + "/" + strTwo, ReplaceValue.ToString());
}
else if (strExpression.IndexOf("+") != -1)
{
strTemp = strExpression.Substring(strExpression.IndexOf("+") + 1, strExpression.Length - strExpression.IndexOf("+") - 1);
strTempB = strExpression.Substring(0, strExpression.IndexOf("+"));
strOne = strTempB.Substring(GetPrivorPos(strTempB) + 1, strTempB.Length - GetPrivorPos(strTempB) - 1);
strTwo = strTemp.Substring(0, GetNextPos(strTemp));
ReplaceValue = Convert.ToDouble(GetExpType(strOne)) + Convert.ToDouble(GetExpType(strTwo));
strExpression = strExpression.Replace(strOne + "+" + strTwo, ReplaceValue.ToString());
}
else if (strExpression.IndexOf("-") != -1)
{
strTemp = strExpression.Substring(strExpression.IndexOf("-") + 1, strExpression.Length - strExpression.IndexOf("-") - 1);
strTempB = strExpression.Substring(0, strExpression.IndexOf("-"));
strOne = strTempB.Substring(GetPrivorPos(strTempB) + 1, strTempB.Length - GetPrivorPos(strTempB) - 1);
strTwo = strTemp.Substring(0, GetNextPos(strTemp));
ReplaceValue = Convert.ToDouble(GetExpType(strOne)) - Convert.ToDouble(GetExpType(strTwo));
strExpression = strExpression.Replace(strOne + "-" + strTwo, ReplaceValue.ToString());
}
}
return Convert.ToDouble(strExpression);
}
private double CalculateExExpress(string strExpression, EnumFormula ExpressType)
{
double retValue = 0;
switch (ExpressType)
{
case EnumFormula.Sin:
retValue = Math.Sin(Convert.ToDouble(strExpression));
break;
case EnumFormula.Cos:
retValue = Math.Cos(Convert.ToDouble(strExpression));
break;
case EnumFormula.Tan:
retValue = Math.Tan(Convert.ToDouble(strExpression));
break;
case EnumFormula.ATan:
retValue = Math.Atan(Convert.ToDouble(strExpression));
break;
case EnumFormula.Sqrt:
retValue = Math.Sqrt(Convert.ToDouble(strExpression));
break;
case EnumFormula.Pow:
retValue = Math.Pow(Convert.ToDouble(strExpression), 2);
break;
}
if (retValue == 0) return Convert.ToDouble(strExpression);
return retValue;
}
private int GetNextPos(string strExpression)
{
int[] ExpPos = new int[4];
ExpPos[0] = strExpression.IndexOf("+");
ExpPos[1] = strExpression.IndexOf("-");
ExpPos[2] = strExpression.IndexOf("*");
ExpPos[3] = strExpression.IndexOf("/");
int tmpMin = strExpression.Length;
for (int count = 1; count <= ExpPos.Length; count++)
{
if (tmpMin > ExpPos[count - 1] && ExpPos[count - 1] != -1)
{
tmpMin = ExpPos[count - 1];
}
}
return tmpMin;
}
private int GetPrivorPos(string strExpression)
{
int[] ExpPos = new int[4];
ExpPos[0] = strExpression.LastIndexOf("+");
ExpPos[1] = strExpression.LastIndexOf("-");
ExpPos[2] = strExpression.LastIndexOf("*");
ExpPos[3] = strExpression.LastIndexOf("/");
int tmpMax = -1;
for (int count = 1; count <= ExpPos.Length; count++)
{
if (tmpMax < ExpPos[count - 1] && ExpPos[count - 1] != -1)
{
tmpMax = ExpPos[count - 1];
}
}
return tmpMax;
}
public string SpiltExpression(string strExpression)
{
string strTemp = "";
string strExp = "";
while (strExpression.IndexOf("(") != -1)
{
strTemp = strExpression.Substring(strExpression.LastIndexOf("(") + 1, strExpression.Length - strExpression.LastIndexOf("(") - 1);
strExp = strTemp.Substring(0, strTemp.IndexOf(")"));
strExpression = strExpression.Replace("(" + strExp + ")", CalculateExpress(strExp).ToString());
}
if (strExpression.IndexOf("+") != -1 || strExpression.IndexOf("-") != -1
|| strExpression.IndexOf("*") != -1 || strExpression.IndexOf("/") != -1)
{
strExpression = CalculateExpress(strExpression).ToString();
}
return strExpression;
}
private string GetExpType(string strExpression)
{
strExpression = strExpression.ToUpper();
if (strExpression.IndexOf("SIN") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("N") + 1, strExpression.Length - 1 - strExpression.IndexOf("N")), EnumFormula.Sin).ToString();
}
if (strExpression.IndexOf("COS") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("S") + 1, strExpression.Length - 1 - strExpression.IndexOf("S")), EnumFormula.Cos).ToString();
}
if (strExpression.IndexOf("TAN") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("N") + 1, strExpression.Length - 1 - strExpression.IndexOf("N")), EnumFormula.Tan).ToString();
}
if (strExpression.IndexOf("ATAN") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("N") + 1, strExpression.Length - 1 - strExpression.IndexOf("N")), EnumFormula.ATan).ToString();
}
if (strExpression.IndexOf("SQRT") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("T") + 1, strExpression.Length - 1 - strExpression.IndexOf("T")), EnumFormula.Sqrt).ToString();
}
if (strExpression.IndexOf("POW") != -1)
{
return CalculateExExpress(strExpression.Substring(strExpression.IndexOf("W") + 1, strExpression.Length - 1 - strExpression.IndexOf("W")), EnumFormula.Pow).ToString();
}
return strExpression;
}
}
}