ruby-uebungen/Assignment_009/solution/readme.md

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# Lösung: Klasse deklarieren
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```ruby
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class Ticket
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attr_reader :spiel
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@@seriennummer = 0
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def initialize(spiel)
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@@seriennummer += 1
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@spiel = spiel
@seriennummer = @@seriennummer
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end
def to_s
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"#{@spiel} [#{@seriennummer}]"
end
def self.verkauft
@@seriennummer
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end
end
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t1 = Ticket.new('Dortmund-Schalke')
t2 = Ticket.new('Hoffenheim-Stuttgart')
puts t1
puts t2
puts Ticket::verkauft
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```