static void Main(string[] args)
{
if (args.Length != 3)
{
Console.WriteLine("ERROR: should pass 3 args.\n\tusage: calculator <a> <operator> <b>");
return;
}
int a = int.Parse(args[0]);
int b = int.Parse(args[2]);
OpDelegate op = Mul;
switch (args[1])
{
case "+":
op = Add;
break;
case "-":
op = Sub;
break;
case "*":
op = Mul;
break;
case "/":
Console.WriteLine(Div(a, b));
return;
}
Console.WriteLine(op(a, b));
}
public SegmentTree(T[] arr, T defValue, OpDelegate operation)
{
var n = arr.Length;
var t = (int)(Math.Ceiling(Math.Log(n) / Math.Log(2)));
var size = (1 << (t + 1)) - 1;
data = new T[size];
this.defValue = defValue;
this.operation = operation;
len = n;
BuildTree(arr, 0, n - 1, 0);
}