public void EvaluateTestOperateWithSubtract()
{
string input = "2 - 1";
ProcessInput PI = new ProcessInput(input);
Evaluate ev = new Evaluate(PI.GetFirstInputNumber(), PI.GetOperator(), PI.GetSecondInputNumber());
int expected = 1;
Assert.AreEqual(expected, ev.Operate());
}
static void Main(string[] args)
{
Console.WriteLine("Calculator");
int count = 0;
string input;
Constant constant = new Constant();
while (true)
{
Console.Write("[{0}]> ", count);
input = Console.ReadLine();
if(input == "exit" || input == "quit")
{
Console.WriteLine("loggin out");
break;
}
ProcessInput PI = new ProcessInput(input);
try
{
Evaluate ev = new Evaluate(PI.GetFirstInputNumber(), PI.GetOperator(), PI.GetSecondInputNumber());
Console.WriteLine(" = " + ev.Operate());
}
catch
{
constant.ChangeExpression(input);
try
{
Console.WriteLine(constant.GetExpression());
}
catch
{
Console.WriteLine("Error! Try again . . .");
}
}
count++;
}
}
public int GetExpression()
{
if(Input.Trim().Length == 1)
{
if (Char.IsLetter(char.Parse(Input.Trim()))) {
if (IsInList(char.Parse(Input.Trim())))
{
return GetValueOf(char.Parse(Input.Trim()));
}
else
{
throw new FormatException();
}
}
else
{
throw new FormatException();
}
}
else
{
var leftside = Input.Split('=')[0].Trim();
if(leftside.Length != 1 || Input.Split('=').Length != 2)
{
throw new FormatException();
}
else
{
if (IsInList(char.Parse(leftside)))
{
throw new FormatException();
}
var rightside = Input.Split('=')[1].Trim();
if(rightside.Length == 0)
{
throw new FormatException();
}
try
{
for (int i = 0; i < rightside.Length; i++)
{
if (Char.IsLetter(rightside[i]))
{
if (IsInList(rightside[i]))
{
//this line has the error
//string newRightside = rightside.Insert(i, GetValueOf(rightside[i]).ToString());
//rightside.Replace(i, 1);
//s.Remove(3, 2).Insert(3, "ZX");
rightside = rightside.Remove(i, 1).Insert(i, GetValueOf(rightside[i]).ToString());
}
else
{
throw new FormatException();
}
}
}
ProcessInput PI = new ProcessInput(rightside);
try
{
PI.GetOperator();
Evaluate ev = new Evaluate(PI.GetFirstInputNumber(), PI.GetOperator(), PI.GetSecondInputNumber());
int rightsideResult = ev.Operate();
AddToConstants(char.Parse(leftside), rightsideResult);
return rightsideResult;
}
catch
{
AddToConstants(char.Parse(leftside), int.Parse(rightside));
return int.Parse(rightside);
}
}
catch
{
throw new FormatException();
}
}
}
}