Created
February 15, 2020 14:44
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| # 改札機プログラム（自力作） | |
| STATION = ['harajyuku', 'omotesando', 'nogizaka'] | |
| class Gate | |
| attr_accessor :name | |
| def initialize(name) | |
| @name = name | |
| end | |
| def enter(ticket) | |
| @@from_station = STATION.index(self.name.to_s) | |
| @price = ticket.price | |
| end | |
| def exit(ticket) | |
| @@dest_station = STATION.index(self.name.to_s) | |
| @price = ticket.price | |
| length = @@dest_station - @@from_station | |
| case @price | |
| when 150 | |
| puts length < 2 | |
| when 190 | |
| puts length < 3 | |
| end | |
| end | |
| end | |
| class Ticket | |
| attr_accessor :price | |
| def initialize(price) | |
| @price = price | |
| end | |
| end | |
| # 改札機オブジェクトの作成 | |
| harajyuku = Gate.new(:harajyuku) | |
| omotesando = Gate.new(:omotesando) | |
| nogizaka = Gate.new(:nogizaka) | |
| # 150円の切符を原宿で購入し乃木坂で降車する(NG) | |
| ticket = Ticket.new(150) | |
| harajyuku.enter(ticket) | |
| nogizaka.exit(ticket) # => false | |
| # 190円の切符を原宿で購入し乃木坂で降車する(OK) | |
| ticket = Ticket.new(190) | |
| harajyuku.enter(ticket) | |
| nogizaka.exit(ticket) # => true | |
| # 150円の切符を原宿で購入し表参道で降車する(OK) | |
| ticket = Ticket.new(150) | |
| harajyuku.enter(ticket) | |
| omotesando.exit(ticket) # => true | |
| # 150円の切符を表参道で購入し乃木坂で降車する(OK) | |
| ticket = Ticket.new(150) | |
| omotesando.enter(ticket) | |
| nogizaka.exit(ticket) # => true |
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