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a guest Aug 17th, 2019 58 Never
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  1. Error:(4, 52) value amt is not a member of Bill
  2.    def compare(that: Bill): Int = (this.amt - that.amt)
  3.      
  4. import scala.math.Ordered
  5.  
  6. class Bill(amt : Int) extends Ordered[Bill] {
  7.    def compare(that: Bill): Int = (this.amt - that.amt)
  8. }
  9.  
  10. object Test extends App {
  11.  val one = new Bill(10)
  12.  val two = new Bill(20)
  13.  println(one < two)
  14.  
  15. }
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