Question

这是我到目前为止所做的，但如果用户输入2种或更多车型，则数组不会保存第一个值。如果我删除car.get_方法，程序运行正常而不保存用户输入。有没有我缺少的方法？

class Cars

    def set_make(make)
    end

    def set_model(model)
    end

    def set_year(year)
    end

    array_of_cars = Array.new 

  print "How many cars do you want to create? "
  num_cars = gets.to_i
  puts 

  for i in 1.. num_cars
    puts
    print "Enter make for car #{i}: "
    make = gets.chomp

    print "Enter model for car #{i}: "
    model = gets.chomp

    print "Enter year of car #{i}: "
    year = gets.to_i

    c = Car.new

    c.set_make(make)
    c.set_model(model)
    c.set_year(year)

    array_of_cars << c
  end 

    puts
    puts "You have the following cars: " 

  for car in array_of_cars 
    print "#{car.get_year} #{car.get_make} #{car.get_model}"
  end
end

Answer 1

好的，所以主要问题是你调用了定义Car.new类的Car。你不应该在汽车类中有一系列汽车。您可以尝试创建一个包含汽车数组的Dealership类，然后您可以执行类似这样的操作

class Dealership

  attr_accessor :car_lot

  def initialize
    @car_lot = []
  end

  def add_car(car)
    @car_lot << car
  end
end
crazy_carls = Dealership.new
car1 = Car.new(make, model, year)

crazy_carls.add_car(car1)
crazy_carls.car_lot.each do |car
  print "#{car.get_year} #{car.get_make} #{car.get_model}"
end

首先需要对汽车类进行重构，然后研究如何使用initialize方法，attr_accessor和instance variables。

数组不保存ruby中的用户输入

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