我一直收到以下错误消息：
text.rb:2:in `<main>': undefined method `choices' for main:Object (NoMethodError)
但我似乎无法理解为什么我的方法是“未定义的”：
puts "Select [1] [2] [3] or [q] to quit"; users_choice = gets.chomp
choices(users_choice)
def choices (choice)
while choice != 'q'
case choice
when '1'
puts "you chose one!"
when '2'
puts "you chose two!"
when '3'
puts "you chose three!"
end
end
end
解决方法
这是因为您在定义方法之前调用方法选择.编写如下代码：
puts "Select [1] [2] [3] or [q] to quit"
users_choice = gets.chomp
def choices (choice)
while choice != 'q'
case choice
when '1'
break puts "you chose one!"
when '2'
break puts "you chose two!"
when '3'
break puts "you chose three!"
end
end
end
choices(users_choice)
我用break来退出while循环.否则它将创建一个无限循环.