static void Main(string[] args)
{
Calculator calculator = new Calculator();
ArgumentsParser parser = new ArgumentsParser();
while (true) // Loop indefinitely
{
Console.WriteLine("Enter a number:");
string strNumber1 = Console.ReadLine();
Console.WriteLine("Enter another number:");
string strNumber2 = Console.ReadLine();
Console.WriteLine("Enter an operator:");
string strOperator = Console.ReadLine();
//Parse inputs
try
{
CalculationArgument arguments = parser.Parse(strNumber1, strNumber2, strOperator);
calculator.Process(arguments);
Console.WriteLine("Result: {0} (press enter to continue or 'exit' to quit)", calculator.Result);
// Log calculation using Trace for now, why not use Log4net?
Trace.WriteLine(String.Format("Calcul {0} {1} {2} ={3} time:{4}", arguments.FirstArgument, arguments.Operator, arguments.SecondArgument, calculator.Result, DateTime.Now.ToString()));
}
catch (ArgumentException ex)
{
Console.WriteLine(String.Format("Input error: {0}", ex.Message));
Trace.WriteLine(String.Format(String.Format("User Input Error: {0}", ex.Message)));
}
catch (Exception ex)
{
Console.WriteLine(String.Format("Error:{0}", ex.Message));
Trace.WriteLine(String.Format("Other error: {0}", ex.Message));
}
if (Console.ReadLine() == "exit")
{
break;
}
}
}
public void Process(CalculationArgument parsedInput)
{
Result = parsedInput.FirstArgument;
switch (parsedInput.Operator)
{
case "+":
Result += parsedInput.SecondArgument;
break;
case "-":
Result -= parsedInput.SecondArgument;
break;
case "*":
Result *= parsedInput.SecondArgument;
break;
default:
//Throw execption or console message
throw new ArgumentException("Wrong operator");
}
}
