一个Ruby小程序

本文介绍了一个简易的电影评分管理系统,该系统使用Ruby语言实现,具备添加、更新、展示和删除电影及其评分的功能。用户可以通过简单的命令行交互来管理电影库。

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movies={"huoyingrenzhe"=>3.2,
  "sisheng"=>3.5,
  "haizeiwang"=>3.9
}
puts "what do you want to do?"
puts "Type 'add' to add a movie"
puts "Type 'update' to update all the movies"
puts "Type 'display' to display all the movie"
puts "Type 'delete' to delete a movie"


choice=gets.chomp.downcase
case choice
when "add"
  puts "please input the movie title you like?"
  title=gets.chomp
  if movies[title.to_sym].nil?
     puts "please input the rating of the movie you added"
     rating=gets.chomp
     movies[title]=rating
     puts "the movie was added successfully"
   else
     puts "the movie alread exist!"
   end
when "update"
  puts "the movie you want to update is?"
  title=gets.chomp
  if movies[title].nil?
     puts "the movie is not exist!"
  else
     puts "please input the new rating of that movie"
     movies[title]=gets.chomp.to_i
     puts "the #{title}'s rating is #{movies[title]}"
  end
when 'display'
  movies.each do |movie,rating|
  puts "#{movie}:#{rating}"
  end
when "delete"
  puts "Deleted"
else
  puts "Error!"
end
  
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