'蘭特'：的範圍內沒有隱式轉換成整數

Question

這是代碼：

#this is the array that the numbers are stored on and where x is created 
@numbers = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90] 

#getting the lowest number and taking away 1 so it matches the number at the appropiate index in the array 
def get_low() 
    number1 = $stdin.gets.chomp 
    new1 = number1.to_i - 1 
end 

#getting the highest number and taking away 1 so it matches the number at the appropiate index in the array 
def get_high() 
    number2 = $stdin.gets.chomp 
    new2 = number2.to_i - 1 
end 


#these lines ask the user for the highest and lowest possible number, and call the functions needed to create the 10 random numbers 
print "\nNote: limit is between 1 and 90" 
print "\nLowest possible number is.... " 
puts get_low() 
print "\nHighest possible number is.... " 
puts get_high() 
print "\nYour 10 random numbers are now being generated..." 
print "\nYour numbers are: " 
print "\n" 

#using the rand() function to get 10 random numbers between get_low and get_high 
def get_numbers() 
    x = "\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n \"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n \"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" , \n\"#{@numbers[rand("#{get_low}".."#{get_high}")]}\" " 
end 


puts get_numbers() 

但是當我運行它，我得到約29行以下錯誤：

in 'rand': no implicit conversion of range into integer (TypeError) 
from C:/ruby/ca.rb:29:in 'get_numbers' 
from C:/ruby/ca.rb:33:in '<main>' 

Answer 1

坦率地說，你寫的代碼可以用很多方法改進，我希望分享另一種方法來看問題，看看你是否能夠理解它：

module Config 
    NUMBER_OF_RANDOM_NUMBERS_PER_GAME = 10 
    NUMBER_OF_GAMES = 5 
end 

class RandomTen 
    def initialize 
    user_input 
    end 

    def array 
    Config::NUMBER_OF_RANDOM_NUMBERS_PER_GAME.times.map { rand range } 
    end 

    private 

    def user_input 
    puts 
    puts "Random number range" 
    print "Low : " 
    @low = gets.chomp.to_i 
    print "High: " 
    @high = gets.chomp.to_i 
    end 

    def range 
    @low..@high 
    end 
end 

class Game 
    def self.play 
    Game.new.run.print 
    end 

    def run 
    @results = collect_games do 
     RandomTen.new.array.sort 
    end 

    self 
    end 

    def print 
    puts 
    puts "Sorted random arrays: " 
    @results.each_with_index do |result, index| 
     puts "Game #{index + 1} : #{result}" 
    end 
    end 

    private 

    def collect_games(&block) 
    Config::NUMBER_OF_GAMES.times.map(&block) 
    end 
end 

Game.play 

# ruby game.rb => 
# 
# Random number range 
# Low : 2 
# High: 9 
# 
# Random number range 
# Low : 1 
# High: 6 
# 
# Random number range 
# Low : 2 
# High: 7 
# 
# Random number range 
# Low : 3 
# High: 7 
# 
# Random number range 
# Low : 3 
# High: 8 
# 
# Sorted random arrays: 
# Game 1 : [2, 3, 5, 6, 6, 6, 8, 8, 8, 9] 
# Game 2 : [1, 1, 1, 2, 3, 5, 5, 5, 5, 5] 
# Game 3 : [3, 3, 4, 4, 5, 5, 5, 6, 6, 7] 
# Game 4 : [3, 3, 3, 3, 4, 4, 5, 5, 6, 7] 
# Game 5 : [3, 3, 4, 6, 6, 7, 8, 8, 8, 8] 

注意：

• 我避免限制隨機數的限制，因爲我相信你可能已經這樣做了，因爲你創建數組的方式。

Answer 2

（I目前無法訪問Ruby解釋器）

它可能因爲您將字符串的範圍傳遞給rand方法而失敗，但您應該傳遞整數範圍。從範圍中刪除「，它應該工作

Answer 3

它看起來像你想的低輸入和輸入的高之間的隨機數。我想嘗試get_low加蘭特（get_high）。

報告的問題是，這rand函數想要一個int，並且你當前正在傳遞一個範圍（a .. b）