public float?Calculate(string expression)
{
try
{
var postfix = new InflixToPostfixService().ToPostfix(expression);
return(new PostfixEvaluatorService().Evaluate(postfix));
}
catch (DivideByZeroException)
{
Console.WriteLine("Invalid expression");
return(null);
}
catch (Exception)
{
Console.WriteLine("Oops, something went wrong. Apologies, your expression string is not supported yet.");
return(null);
}
}
/// <summary>
/// This should really be injected through DI Container
/// </summary>
public CalculatorService()
{
inflixToPostfixService = new InflixToPostfixService();
postfixEvaluatorService = new PostfixEvaluatorService();
}