Question

我正在编写一个脚本，我必须创建一个橘子树，每次运行指定的方法时，树的高度都会上升，树的年龄会上升，并且树上的橙子数量会增加。树也增加了。但经过一段时间（它取决于我），这棵树应该死了。所以在我的程序中，我决定如果树是15英尺或更大，它应该死了。现在，每当我通过该方法时，橙子的高度，年龄和数量都会增加，一旦高度超过15英尺，我会收到一条消息说“树已经死了”＃34;但身高不断增加。我希望它一旦树死了就停止。另外，每当用户运行方法进入下一年时，我如何添加不同的东西？例如，现在每年高度增加3，橙子数量增加4，年龄增加1。如何使橙子的高度和数量每年增加一个随机数？（不是太大）这是我的代码。

class OrangeTree

def initialize
@tree_height = 0
@no_oranges = 0
@tree_age = 0
end

def firstYear

    if @tree_height >= 15 then
        puts "Tree is dead"
    end

    @tree_height = @tree_height + 3
    puts "Your orange tree is " + @tree_height.to_s + " feet tall!"

     @tree_age = @tree_age + 1
     puts "Your orange tree is " + @tree_age.to_s + " year old!"

    @no_oranges = @no_oranges + 4
    puts "Your orange tree has " + @no_oranges.to_s + " oranges!"

end

def pickOrange
    if @no_oranges == 0 then
        puts "You can't pick any oranges yet, you have to wait at least a year!" else

    puts "How many oranges do you want to taste?" + " Remember you only have " + @no_oranges.to_s + " oranges on your tree!"
    pick2 = gets.chomp.to_i
    puts "The oranges taste delicious and very refreshing!" 

    @no_oranges = @no_oranges - pick2

    end
    end

    def isDead
        if @tree_height >= 15 then
            return true else
            return false
        end
    end

        def countOranges
            puts "Current number of oranges: " + @no_oranges.to_s
        end
    end

Answer 1

您必须修改firstYear类中的OrangeTree方法，以获取橙色的高度和数量作为参数递增，并在树高达到某个值时从方法返回。

class OrangeTree

  def initialize
    @tree_height = 0
    @no_oranges = 0
    @tree_age = 0
  end

  def firstYear(tree_height_increment, fruit_increment)

    if @tree_height >= 15 then
      puts "Tree is dead"
      return
    end

    @tree_height = @tree_height + tree_height_increment
    puts "Your orange tree is " + @tree_height.to_s + " feet tall!"

    @tree_age = @tree_age + 1
    puts "Your orange tree is " + @tree_age.to_s + " year old!"

    @no_oranges = @no_oranges + fruit_increment
    puts "Your orange tree has " + @no_oranges.to_s + " oranges!"
  end

end

现在，每当您调用firstYear方法时，您都可以指定要增加树的高度和水果值的值。

简单的Ruby类和对象程序

1 个答案: