Zadane 1


object Time{

  def apply(h1: Int) = new Time(h1);
}


class Time(private[this] var h:Int) {
  hour = h;
  def hour:Int = h;
  def hour_=(newHour:Int){
    if(newHour<0) h=0
    else h=newHour;
  }
  
 
}

Zadanie 2a

class Time2(var h:Int, var m:Int){
  require(h>=0 && h<24); //h = hour
  require(m>=0 && m<60); //m = minute
  
  def hour:Int = h;
  def hour_=(newH:Int){
    require(newH>=0 && newH < 24);
    h = newH;
  }
  
  def minute:Int = m;
  def minute_=(newM:Int){
    require(newM>=0 && newM<60);
    m= newM;
  }
  
  def before(other:Time2):Boolean={
    h<other.h || h == other.h && m < other.m
  }
  
}


class Time3(h:Int,m:Int){
  require(h>=0 && h<24);
  require(m>=0 && m<60);
  
  private var minutesAfterMidnight = 60 * h + m;
  
  
  def hour:Int = minutesAfterMidnight / 60;
  def hour_=(newH:Int){
    require(newH>=0 && newH < 24);
    minutesAfterMidnight = minute + newH * 60 ;
  }
  
  def minute:Int = minutesAfterMidnight % 60 ;
  def minute_=(newM:Int){
    require(newM>=0 && newM<60);
    minutesAfterMidnight = 60 * hour + newM;//????
  }
  
  def before(other:Time3):Boolean={
    minutesAfterMidnight < other.minutesAfterMidnight;
  }
  
}