public double Calculate(ArrayList bArray)//86+9*4-8 ,{86,9,4,*,+,8}{-}
{
double no1, no2, ret;
Stack myStack = new Stack();
myStack.Clear();
string ch;
for (int i = 0; i < bArray.Count; i++)
{
if (bArray[i] == null || Convert.ToString(bArray[i]) == "")
{
bArray.RemoveAt(i);
}
}
string[] aStr = new string[bArray.Count];
for (int i = 0; i < bArray.Count; i++)
{
aStr[i] = Convert.ToString(bArray[i]);
aStr[i] = aStr[i].Replace(" ", "");
aStr[i] = aStr[i].ToUpper();
}
myStack.Clear();
for (int i = 0; i < aStr.Length; i++) //86+9*4-8 ,{86,9,4,*,+,8}{-}
{
ch = aStr[i];
if (IsOperandStr(ch)) //如果是操作数，直接压入栈 122,8
{
myStack.Push(ch);
}
else //如果是操作符，就弹出两个数字来进行运算
{
string str1 = Convert.ToString(myStack.Pop());
no1 = Convert.ToDouble(str1);
string str2 = Convert.ToString(myStack.Pop());
no2 = Convert.ToDouble(str2);
IOpperationFactory fac = new MyFactory();
IMathOpperation oper = fac.CreationFactory(no2, no1, ch);
ret = oper.GetResult();
myStack.Push(ret); //将结果压入栈
}
}
return(Convert.ToDouble(myStack.Pop()));//弹出最后的运算结果
}
public IMathOpperation CreationFactory(double numA, double numB, string operation)
{
IMathOpperation Coco = null;
switch (operation)
{
case "+":
Coco = new AddOpperation();
break;
case "-":
Coco = new SubtractionOpperation();
break;
case "*":
Coco = new MultiplyOpperation();
break;
case "/":
Coco = new DivideOpperation();
break;
//case "±":
// Coco = new AddandSubOpperation();
// break;
//case "^x":
// Coco = new PowerOpperation();
// break;
//case "sqrt":
// Coco = new SqrtOpperation();
// break;
//case "log":
// Coco = new LogOpperation();
// break;
//case "ln":
// Coco = new LnOpperation();
// break;
}
Coco.NumA = numA;
Coco.NumB = numB;
return(Coco);
}