//
// simple demo of using loops to operate on arrays
//
def fillArray(a : Array[Int]) {
  for (i <- 0 until a.size)
    a(i) = readInt
}
def printArray(a : Array[Int]) {
  for (i <- 0 until a.size)
    println(a(i))
}
def arrayCombine(a : Array[Int], 
  combine : (Int, Int) => Int, identity : Int) : Int = 
{
  var result = identity
  for (i <- 0 until a.size) 
    result = combine(result, a(i))
  result
}

val a1 = new Array[Int](6)
println("enter " + a1.size + " values for array:")
fillArray(a1)

println("you entered:")
printArray(a1)

println("sum = " + arrayCombine(a1, (x,y)=>(x+y), 0))
println("product = " + arrayCombine(a1, (x,y)=>(x*y), 1))
println("min = " + arrayCombine(a1, (x,y) => (x min y), Int.MaxValue))
println("max = " + arrayCombine(a1, (x,y) => (x max y), Int.MinValue))