-
Notifications
You must be signed in to change notification settings - Fork 0
/
class.rb
64 lines (54 loc) · 1.06 KB
/
class.rb
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
class Song
@@plays = 0 # calss variate
def initialize( name, artist ,duration)
@name = name
@artist = artist
@duration = duration
@plays = 0
end
#def to_s
# "Song: #@name--#{@artist} (#{@duration})"
#end
#def name
# @name
#end
attr_reader :name, :artist,:duration
#def name= (new_name)
# @name = new_name
#end
attr_writer :duration
def play
@plays += 1
@@plays += 1
"This song: #{@plays} plays, Total #{@@plays} plays."
end
end
class Karaokesong < Song
end
song = Song.new("fly","Tom",210)
#puts song
#puts song.inspect
#puts song.to_s
puts song.name
#########################################
##attr_reader :name, :artist,:duration /attr_writer :duration
#song.name = "Jump"
#puts song.name
song.duration = 444
puts song.duration
############################
#quote
persion1 = "Tim"
#persion2 = persion1
persion2 = persion1.dup
persion1[0] = 'J'
puts persion1
puts persion2
##############################
#class variate
s1 = Song.new("song1","AAA",123)
s2 = Song.new("song2","BBB",369)
puts s1.play
puts s2.play
puts s1.play
puts s2.play