// class contains all mathematical operation-related functions
public static string getFinalAns(List <string> input)
{
// loop through final formatted list
// pass numbers and operator into calculate function
List <string> formattedList = ProcessInput.formatInput(input);
for (int i = 0; i < formattedList.Count; i++)
{
if (formattedList[i].Equals("^"))
{
formattedList = calculate(formattedList, i);
--i;
}
}
for (int i = 0; i < formattedList.Count; i++)
{
if (CheckInput.timesDivOrMod(formattedList[i]))
{
formattedList = calculate(formattedList, i);
--i;
}
}
for (int i = 0; i < formattedList.Count; i++)
{
if (CheckInput.plusOrMinus(formattedList[i]))
{
formattedList = calculate(formattedList, i);
--i;
}
}
return("" + double.Parse(formattedList[0]));
}
private static bool hasNonDouble(string input)
{
// check whether there is a non-double value in input
List <string> numList = ProcessInput.toNumList(input);
foreach (string value in numList)
{
if (!(isDouble(value)))
{
return(true);
}
}
return(false);
}
public static bool divZero(List <string> inputList)
{
// check whether there is a "division by 0" expression in input
List <string> formattedList = ProcessInput.formatInput(inputList);
for (int i = 0; i < formattedList.Count; i++)
{
if ((formattedList[i].Equals("/") || formattedList[i].Equals("%")) &&
double.Parse(formattedList[i + 1]) == 0)
{
return(true);
}
}
return(false);
}
private void equalsBtn_Click(object sender, EventArgs e)
{
// print result in textbox based on current input
// change state of textbox content based on result of calculation
List <string> inputList = ProcessInput.splitInput(ioBox.Text);
if (CheckInput.isInvalid(ioBox.Text, inputList))
{
ioBox.Text = "Invalid double";
isErrMsg = true;
}
else if (CheckInput.divZero(inputList))
{
ioBox.Text = "Division by zero";
isErrMsg = true;
}
else
{
ioBox.Text = Operations.getFinalAns(inputList);
isAns = true;
}
}