ruby程序基本设计讲解

Question

我想用下面的代码重写下面的代码，但是我卡住了。

def ask question
good_answer = false
while (not good_answer)
    puts question
    reply = gets.chomp.downcase

    if (reply == 'yes' or reply =='no')
        good_answer = true
        if reply == 'yes'
            answer = true
        else
            answer = false
        end
    else
        puts 'Please answer "yes" or "no"'
    end
end
answer
end

替换代码:

def ask question
    puts question
    reply = gets.chomp
    if (reply == 'yes' or reply == 'no')
        puts reply.capitalize
    else
        puts 'Please enter "yes" or "no"'
        #jump the code to like 2 ( but how?)- use while reply != empty & comment the below lines
        puts question
        reply = gets.chomp
    end
end

我想跳转到程序的主要部分，有没有goto、jump或者我可以在那个方法里面调用方法吗？

Answer 1

I want to jump to the main part of program is there any goto, jump or can I call method inside that method?

是的，它被称为循环，即您在原始代码中使用的内容。到底为什么要用 goto 替换循环？没有意义。

然而，它可以被简化。我不喜欢检查"is"或“否”，但我也没有时间重组您的程序。

def ask question
  while true
    puts(question)
    reply = gets.chomp.downcase
    if reply == 'yes' || reply == 'no'
      return reply == 'yes'
    else
      puts('Please answer "yes" or "no"')
    end 
  end
end