1. Zadane 1
2.  
3.  
4. object Time{
5.  
6.   def apply(h1: Int) = new Time(h1);
7. }
8.  
9.  
10. class Time(private[this] var h:Int) {
11.   hour = h;
12.   def hour:Int = h;
13.   def hour_=(newHour:Int){
14.     if(newHour<0) h=0
15.     else h=newHour;
16.   }
17.  
18.  
19. }
20.  
21. Zadanie 2a
22.  
23. class Time2(var h:Int, var m:Int){
24.   require(h>=0 && h<24); //h = hour
25.   require(m>=0 && m<60); //m = minute
26.  
27.   def hour:Int = h;
28.   def hour_=(newH:Int){
29.     require(newH>=0 && newH < 24);
30.     h = newH;
31.   }
32.  
33.   def minute:Int = m;
34.   def minute_=(newM:Int){
35.     require(newM>=0 && newM<60);
36.     m= newM;
37.   }
38.  
39.   def before(other:Time2):Boolean={
40.     h<other.h || h == other.h && m < other.m
41.   }
42.  
43. }
44.  
45.  
46. class Time3(h:Int,m:Int){
47.   require(h>=0 && h<24);
48.   require(m>=0 && m<60);
49.  
50.   private var minutesAfterMidnight = 60 * h + m;
51.  
52.  
53.   def hour:Int = minutesAfterMidnight / 60;
54.   def hour_=(newH:Int){
55.     require(newH>=0 && newH < 24);
56.     minutesAfterMidnight = minute + newH * 60 ;
57.   }
58.  
59.   def minute:Int = minutesAfterMidnight % 60 ;
60.   def minute_=(newM:Int){
61.     require(newM>=0 && newM<60);
62.     minutesAfterMidnight = 60 * hour + newM;//????
63.   }
64.  
65.   def before(other:Time3):Boolean={
66.     minutesAfterMidnight < other.minutesAfterMidnight;
67.   }
68.  
69. }
70.  
71.