我已经重做了问题，并包含了两个文件的完整代码。在touch_in方法中，我试图在名为“ journey”的变量中实例化Journey类。
require_relative 'journey'
class Oystercard
MAXIMUM_BALANCE = 90
MINIMUM_BALANCE = 1
MINIMUM_CHARGE = 1
def initialize
@balance = 0
@journeys = {}
end
def top_up(amount)
fail 'Maximum balance of #{maximum_balance} exceeded' if amount + balance > MAXIMUM_BALANCE
@balance += amount
end
def in_journey?
@in_journey
end
def touch_out(station)
deduct(MINIMUM_CHARGE)
@exit_station = station
@in_journey = false
@journeys.merge!(entry_station => exit_station)
end
def touch_in(station)
fail "Insufficient balance to touch in" if balance < MINIMUM_BALANCE
journey = Journey.new
@in_journey = true
@entry_station = station
end
attr_reader :journeys
attr_reader :balance
attr_reader :entry_station
attr_reader :exit_station
private
def deduct(amount)
@balance -= amount
end
end
旅程文件如下：
class Journey
PENALTY_FARE = 6
MINIMUM_CHARGE = 1
def initialize(station = "No entry station")
@previous_journeys = {}
end
def active?
@active
end
def begin(station = "No entry station")
@active = true
@fare = PENALTY_FARE
@entry_station = station
end
def finish(station = "No exit station")
@active = false
@fare = MINIMUM_CHARGE
@exit_station = station
@previous_journeys.merge!(entry_station => exit_station)
end
attr_reader :fare
attr_reader :previous_journeys
attr_reader :entry_station
attr_reader :exit_station
end
我认为'touch_in'方法应该创建一个'旅程'变量，我在上面调用了这些方法，例如'finish（station）'或'active？'。等等。当我尝试在IRB中执行此操作时，出现以下错误：
2.6.3 :007 > journey
Traceback (most recent call last):
4: from /Users/jamesmac/.rvm/rubies/ruby-2.6.3/bin/irb:23:in `<main>'
3: from /Users/jamesmac/.rvm/rubies/ruby-2.6.3/bin/irb:23:in `load'
2: from /Users/jamesmac/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top (required)>'
1: from (irb):7
NameError (undefined local variable or method `journey' for main:Object)
我知道上面的许多代码都是草率编写的，除了“旅途”问题外，可能还有其他地方，这是错误的。如果是这种情况，请告诉我越多越好。
对任何试图在我的第一次尝试中帮助我的人表示歉意，正如我说的那样，我仍然习惯于SO，并试图使文章更易于阅读。
class Journey
# ...
def initialize
puts "Journey initialized"
# ...
end
# ...
end
require_relative 'journey'
class Oystercard
def initialize
end
# ...
def touch_in(station)
journey = Journey.new
# ...
end
end
Oystercard.new.touch_in("station")
stack_question $ ruby oystercard.rb
旅程已初始化
效果很好-您对此是否有超出问题范围的问题？