import sun.misc.Signal
import sun.misc.SignalHandler

object SignalHandl extends App {
  val start = System.nanoTime()
  var counter = 0

  Signal.handle(new Signal("INT"), new SignalHandler() {
    def handle(sig: Signal) {
      println(f"\nProgram execution took ${(System.nanoTime() - start) / 1e9f}%f seconds\n")
      exit(0)
    }
  })

  while (true) {
    counter += 1
    println(counter)
    Thread.sleep(500)
  }
}