module Print
  use int.Int
  use mach.java.io.PrintStream
  use mach.java.lang.String
  use mach.java.lang.System
  use mach.java.lang.Integer
  use mach.java.lang.Array
  
    let print_array (o : print_stream) (prefix : string) (values : array integer) (i_begin i_end : integer) : unit
     requires { 0 <= i_begin <= i_end <= values.length }
  =
    print o prefix;
    print o "[";
    for i = i_begin to i_end - 1 do
      let fmt = if i <> i_begin then ", %d" else "%d" in
      print o (String.format_1 fmt values[i]);
    done;
    print o "]"

  let main (_: array string) : unit
  =        
    let a = Array.make 5 0 in
    for i = 0 to a.length - 1 do 
      a[i] <- a.length - i;
    done;
    print_array System.out "a = " a 0 a.length;
    println System.out ()

end