// Operations + calculating result
public void OperationButton(string button)
{
try
{
if (FirstOperand == string.Empty || LastOperation == "=")
{
FirstOperand = display;
LastOperation = button;
}
else
{
SecondOperand = display;
Operation = lastOperation;
_calc.CalculateResult();
LastOperation = button;
Display = Result;
FirstOperand = display;
}
newDisplayRequired = true;
}
catch (Exception e)
{
Console.WriteLine(e);
Display = Result == string.Empty ? "ERROR - SEE EVENT LOG" : Result;
throw;
}
}
