毛冬

[code]def sayGoodnight(name) #result = "Goodnight #{name}" result = "Goodnight, " + name return result end [/code] [code]puts (sayGoodnight ("john-bo"))[/code] Goodnight, john-bo 執行成功 ...

[code="ruby"] class Song def initialize(name,artist,duration) @name = name @artist = artist @duration = duration end def to_s "Song : #{@name}--#{@artist} (#{@duration})" e...