println("What is the current number of seconds since midnight?")
val s = readInt
val m = (s/60) % 60
val h = (s/60/60) % 24
That is my current code. I just do not know how to println("") so it displays in hh:mm form. Thank you in advance for any help!
I think the answer is
"%02d:%02d".format(h, m)
based on http://www.scala-lang.org/old/node/5153
Mostly like @Floris said:
val s = System.currentTimeMillis / 1000
val m = (s/60) % 60
val h = (s/60/60) % 24
val str = "%02d:%02d".format(h, m)
// str = 22:40
Now you could print it, just like you would with regular string.
Since scala 2.10 there is string interpolation feature, which allows you to write things like:
val foo = "bar"
println(s"I'm $foo!")
// I'm bar!
But I don't think it is much readable (reminds perl):
val str = f"$h%02d:$m%02d"
// show elapsed time as hours:mins:seconds
val t1 = System.currentTimeMillis/1000
// ... run some code
val t2 = System.currentTimeMillis/1000
var elapsed_s = (t2 - t1)
// for testing invent some time: 4 hours: 20 minutes: 10 seconds
elapsed_s=4*60*60 + 20*60 + 10
val residual_s = elapsed_s % 60
val residual_m = (elapsed_s/60) % 60
val elapsed_h = (elapsed_s/60/60)
// display hours as absolute, minutes & seconds as residuals
println("Elapsed time: " + "%02d:%02d:%02d".format(elapsed_h, residual_m,
residual_s))
