object OperatorOverRange {
  def operateOverRange(f: Int => Int)(operate: (Int, Int) => Int)(base: Int)(a: Int, b:Int): Int =
    if (a > b) base else operate(f(a), operateOverRange(f)(operate)(base)(a + 1, b))

  def main(args: Array[String]) {
    println("Sum of range of numbers from 3 to 8 is: " + operateOverRange(x => x)((x,y) => x + y)(0)(3,8))
    println("Product of range of numbers from 3 to 8 is: " + operateOverRange(x => x)((x,y) => x * y)(1)(3,8))
  }
}