public string Calculate(string input)
{
// creates a new RegexProcessor
RegexUtil regexProcessing = new RegexUtil();
// creates a new setting ConstantParser
ConstantParser constantSetting = new ConstantParser();
// extract integers
ArrayList integers = regexProcessing.ExtractNums(input);
// extracts operand
string thisOp = regexProcessing.ExtractsOp(input);
// holds answer value
string answer;
// make a new instance of the applicable class per the
// operand extracted
switch (thisOp)
{
case "+":
AddIt thisAddExp = new AddIt();
answer = thisAddExp.Addition(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "-":
SubtractIt thisSubExp = new SubtractIt();
answer = thisSubExp.Subtraction(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "*":
MultiplyIt thisMultiExp = new MultiplyIt();
answer = thisMultiExp.Multiplication(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "/":
DivideIt thisDivExp = new DivideIt();
answer = thisDivExp.Division(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "%":
ModIt thisModExp = new ModIt();
answer = thisModExp.Modulation(integers).ToString();
LastQnA.LastAns = Convert.ToInt32(answer);
LastQnA.LastQ = input;
return answer;
case "=":
answer = "Your value has been set";
return answer;
default: throw new ArgumentException("Input doesn't contain an operand understood {0}", thisOp);
}
}
public void MultiplicationTest()
{
MultiplyIt testMulti = new MultiplyIt();
ArrayList myNums = new ArrayList();
myNums.Add(5);
myNums.Add(5);
int answer = testMulti.Multiplication(myNums);
Assert.AreEqual(answer, 25);
}