//
// Supporting material for lecture 3
// - formatting and validating a time
//
import FormatIO.*;

public class ValidTime {
    public static void main(String[] args){

	  Console con = new Console();
	  int hours  = -1;
	  int minutes  = -1;
	  boolean valid = false;

	  while (!valid){
	      con.print("enter hours: ");
	      hours = con.readInt();
	      con.print("enter minutes: ");
	      minutes = con.readInt();
	      con.println(String.format("%02d:%02d",hours,minutes));
	  }
	  con.println(String.format("%02d:%02d",hours,minutes));
    }
}
//
// input a valid time
//