private static void RunTests()
{
Calculator c = new Calculator ();
Console.WriteLine(c.Compute ("1 + 1"));
Console.WriteLine(c.Compute ("1 + 1 + 1"));
Console.WriteLine(c.Compute ("1 + 2 * 3"));
Console.WriteLine(c.Compute ("5 - 6"));
Console.WriteLine(c.Compute ("8 * 4"));
Console.WriteLine(c.Compute ("1 + 1 - 4 * 4"));
Console.WriteLine(c.Compute ("1 + 1 - 4 / 2"));
c.AddOperator (new PowerOperator ());
Console.WriteLine(c.Compute ("1 + 5 * 2 ^ 3"));
}
public static void Main()
{
// RunTests();
Calculator c = new Calculator ();
// Shows extensibility of operands
c.AddOperator (new PowerOperator ());
do {
string s = Console.ReadLine ();
try
{
Console.WriteLine (c.Compute (s));
} catch (Exception e)
{
Console.WriteLine("Caught exception: " + e);
}
} while (true);
}