static void Main(string[] args)
{
System.Console.WriteLine("Hello user");
var calculator = new Logic.Calculator();
ExpectedInput expectedInput = ExpectedInput.Operant;
string[] operationSymbols = { "+", "-", "*", "/" };
PrintMenu();
while (true)
{
string usersInput = System.Console.ReadLine();
if (string.Compare(usersInput, "Q", true, CultureInfo.InvariantCulture) == 0)
{
System.Console.WriteLine("Goodbye!");
break;
}
if (expectedInput == ExpectedInput.Operant)
{
if (!float.TryParse(usersInput, out float operand1))
{
System.Console.WriteLine("Entered number is not valid. Please enter valid number");
System.Console.WriteLine("Press Q to exit");
}
else
{
expectedInput = ExpectedInput.Operation;
calculator.Operand1 = operand1;
System.Console.WriteLine("Enter operation type ");
}
}
else if (expectedInput == ExpectedInput.Operation)
{
string userInputTrimmed = usersInput.Trim();
if (operationSymbols.Contains(userInputTrimmed))
{
int index = operationSymbols.ToList().IndexOf(userInputTrimmed);
calculator.OperationType = (OperationType)(index + 1);
expectedInput = ExpectedInput.Operant2;
System.Console.WriteLine("Enter second operant ");
}
else
{
System.Console.WriteLine("Entered operation type is not valid. Please enter valid operation");
System.Console.WriteLine("Press Q to exit");
}
}
else if (expectedInput == ExpectedInput.Operant2)
{
if (!float.TryParse(usersInput, out float operand2))
{
System.Console.WriteLine("Entered number is not valid. Please enter valid number");
}
else
{
expectedInput = ExpectedInput.Result;
calculator.Operand2 = operand2;
float result = calculator.PerfomeAction();
calculator.Result = result;
string history = calculator.ShowHistory();
System.Console.WriteLine($"Result is: {history} = {result}");
System.Console.WriteLine("Press Enter to start over");
}
}
else if (expectedInput == ExpectedInput.Result)
{
expectedInput = ExpectedInput.Operation;
calculator.Operand1 = calculator.Result;
System.Console.WriteLine(calculator.Result);
System.Console.WriteLine("Enter operation type ");
}
}
}