// Main class
static void Main(string[] args)
{
// print output based on invalidity tests
if (args.Length != 0)
{
string input = args[0];
input = input.Trim();
List <string> inputList = ProcessInput.splitInput(input);
if (CheckInput.isInvalid(input, inputList) || args.Length != 1)
{
Console.WriteLine("Invalid Input");
}
else if (CheckInput.divZero(inputList))
{
Console.WriteLine("Division by zero");
}
else if (!CheckInput.isInt(Operations.getFinalAns(inputList)))
{
Console.WriteLine("Out of Range");
}
else
{
Console.WriteLine("Result = " + Operations.getFinalAns(inputList));
}
}
else
{
Console.WriteLine("Invalid Input");
}
Console.ReadLine();
}
// 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 (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("" + long.Parse(formattedList[0]));
}
private static bool hasNonInt(string input)
{
// check whether there is a non-integer value in input
List <string> numList = ProcessInput.toNumList(input);
foreach (string value in numList)
{
if (!(isInt(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("%")) &&
int.Parse(formattedList[i + 1]) == 0)
{
return(true);
}
}
return(false);
}