Question

我正在尝试编写一个程序，该程序接受用户的输入（句子），用户要旋转的单词，并围绕用户选择的单词输出旋转的句子。例如。句子：这是一本书旋转的单词：书输出：book这是一个

我似乎无法退出输入数据的循环（程序不断要求输入，而不做其他任何事情。）请帮忙。这是我的代码：

class SentenceRotator
  def get_sentence
    puts "Please enter your sentence: "
    sentence = gets.chomp
    get_word
  end

  def get_word
   puts "Please enter the word you want to rotate around: "
   word = gets.chomp
   if converts_sentence_to_array.include?(word)
     rotate_sentence_around_word
   else
     puts "Your word isn't in the sentence. Please enter another word."
     word = gets.chomp
   end
   rotate_sentence_around_word
  end

  def converts_sentence_to_array()
    get_sentence.split(" ")
  end

  def rotate_sentence_around_word()
    new_array = converts_sentence_to_array.each_with_index {|word,index| converts_sentence_to_array.rotate(index)}
    new_array
  end
end

new_app = SentenceRotator.new
new_app.rotate_sentence_around_word

Answer 1

这是您想要的逻辑，分为几行：

# input
sentence = 'This is a book'
word = 'book'

# processing
words = sentence.split
pos = words.index(word)
rotated = words.rotate(pos)
back_together = rotated.join(' ')

# output
p back_together

我建议您尽可能分离处理代码。然后，您可以专注于终端输入和输出逻辑，这实际上似乎是您的问题。

Answer 2

我似乎无法退出这种输入数据的循环（程序不断要求输入，而不做其他任何事情。）

您似乎最主要的问题是正确接收用户的输入并输入旋转逻辑。您可以使用attr_reader来访问跨方法的输入。我对您的班级进行了一些更改，以分多个步骤接受输入：

class SentenceRotator
  attr_reader :sentence, :rotate_on_word

  def get_sentence
    puts "Please enter your sentence: "
    @sentence = gets.chomp
  end

  def get_word_to_rotate_on
    puts "Please enter the word you want to rotate around: "
    @rotate_on_word = gets.chomp
    unless sentence.include?(rotate_on_word)
      puts "Your word isn't in the sentence. Please enter another word."
      get_word_to_rotate_on
    end
  end

  def rotate
    puts sentence
    puts rotate_on_word
    puts 'You have all the info. Add the logic to rotate.'
  end
end

> new_app = SentenceRotator.new

> new_app.get_sentence
Please enter your sentence: 
This is a very funny book

> new_app
 => #<SentenceRotator:0x00007fee44178c40 @sentence="This is a very funny book">

> new_app.get_word_to_rotate_on
Please enter the word you want to rotate around: 
a

> new_app
 => #<SentenceRotator:0x00007fee44178c40 @sentence="This is a very funny book", @rotate_on_word="a">

> new_app.rotate
This is a very funny book
a
You have all the info. Add the logic to rotate.

Answer 3

new_app = SentenceRotator.new
new_app.rotate_sentence_around_word

因此，调用方法：rotate_sentence_around_word => converts_sentence_to_array => get_sentence => get_word => converts_sentence_to_array => get_sentence => ...

尝试这样的事情：

class SentenceRotator
  def gets_user_data
    puts "Please enter your sentence: "
    @sentence = get_sentence.split(" ")

    puts "Please enter the word you want to rotate around: "
    @word = get_word_to_rotate_on
  end

  def get_sentence
    gets.chomp
  end

  def get_word_to_rotate_on
    word = gets.chomp
    return word if @sentence.include?(word)

    puts "Your word isn't in the sentence. Please enter another word."
    get_word_to_rotate_on
  end

  def rotate_sentence_around_word()
    gets_user_data
    @sentence.rotate(@sentence.index(@word)).join(' ')
  end
end

new_app = SentenceRotator.new
new_app.rotate_sentence_around_word

句子旋转程序无法正常使用红宝石

3 个答案: