// A utility method to apply an operator 'op' on operands 'a'
// and 'b'. Return the result.
public static long DoOperation(string op, long b, long a)
{
checked
{
switch (op)
{
case "+":
return(a + b);
case "-":
return(a - b);
case "*":
return(a * b);
case "/":
return(a / b);
case "%":
return(a % b);
case "&":
return(a & b);
case "^":
return(a ^ b);
case "|":
return(a | b);
case ">>":
return(Convert.ToInt64(Bitwise.Rsh(a.ToString(), b.ToString())));
case "<<":
return(Convert.ToInt64(Bitwise.Lsh(a.ToString(), b.ToString())));
}
}
return(0);
}