//
// program to count out change
// prompt user for cents (positive integer)
// print error message if negative
// otherwise print equivalent number of dollars, quarters, dimes, nickels, pennies.
// (but only nonzero values)
println("enter a number of cents (positive integer)")
val cents = readInt

if (cents <= 0)
  println("number is not positive!")
else {

  val dollars = cents / 100
  if (dollars != 0)
    println(dollars + " dollars")

  val quarters = (cents - dollars * 100) / 25
  if (quarters != 0)
    println(quarters + " quarters")

  val dimes = (cents - dollars * 100 - quarters * 25) / 10
  if (dimes != 0)
    println(dimes + " dimes")

  val nickels = (cents - dollars * 100 - quarters * 25 - dimes * 10) / 5
  if (nickels != 0)
    println(nickels + " nickels")

  val pennies = cents - dollars * 100 - quarters * 25 - dimes * 10 - nickels * 5
  if (pennies != 0)
    println(pennies + " pennies")

  val check = dollars*100 + quarters*25 + dimes*10 + nickels*5 + pennies
  println("total " + check)

}