edadma

def pow(x: Int, n: Int) = {
  def pow(y: Int, x: Int, n: Int): Int =
    n match {
      case 0 => 1
      case 1 => x * y
      case _ if n % 2 == 0 => pow(y, x * x, n / 2)
      case _ => pow(x * y, x * x, (n - 1) / 2)
    }

  if (n < 0) sys.error(s"pow: negative exponent: $n") else pow(1, x, n)

edadma

object Main extends App {

  val symbols =
    Map[String, (PrefixOperator, InfixOperator)](
      "+" -> (PrefixOperator(30, +_), InfixOperator(10, LeftAssoc, _ + _)),
      "-" -> (PrefixOperator(30, -_), InfixOperator(10, LeftAssoc, _ - _)),
      "*" -> (null, InfixOperator(20, LeftAssoc, _ * _)),
      "/" -> (null, InfixOperator(20, LeftAssoc, _ / _)),
      "^" -> (null, InfixOperator(30, RightAssoc, pow)),
      "(" -> null,

edadma

	def dump {
		val cur = file.getFilePointer
		val width = 16
		
		file.seek( 0 )
		
		def printByte( b: Int ) = print( "%02x ".format(b&0xFF).toUpperCase )
		
		def printChar( c: Int ) = print( if (' ' <= c && c <= '~') c.asInstanceOf[Char] else '.' )