static void Main(string[] args)
{
try
{
var provider = CommandArgumentsNumberProvider.Create(args);
var calc = new Calculator(provider);
var sum = calc.Sum();
Console.WriteLine(sum);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
public static INumberProvider Create(string[] args)
{
try
{
int a = Convert.ToInt32(args[0]);
int b = Convert.ToInt32(args[1]);
var provider = new CommandArgumentsNumberProvider(a, b);
return(provider);
}
catch
{
throw new NumberException("Can't convert to int32");
}
}