Question

我正在开发一个程序，为用户提供两个随机数，范围从0到10，供用户进行分割，乘法，加法或减法。

在每个问题之后，用户都有机会通过键入no来停止该程序。

我正在使用while循环，但是当用户输入no时，我无法终止循环。如何让程序正确响应用户输入？

def math_num
  nums = [num_1 = rand(1..10), num_2 = rand(1..10), operator = ["+", "-", "/", "*"].sample]
  problem = "What is #{num_1} #{operator} #{num_2}?"
  puts problem

  $input = gets.to_i
  $answer = num_1.send(operator, num_2)

  puts $input == $answer ? "You answered #{$input}, and the answer is #{$answer}! You are correct!" : "The answer is #{$answer}, not #{$input}! You are incorrect!"   

  def try_again
    puts "Would you like to do another question?"
    another = gets.chomp.to_s
    while another != "no"
        math_num
    end
  end

  try_again 

end

math_num

Answer 1

好吧，你这样做的方式是你得到一个无限循环，因为another变量的值没有在while循环中更新。

请改为尝试：

def math_num
    while true
        nums = [num_1 = rand(1..10), num_2 = rand(1..10), operator = ["+", "-", "/","*"].sample]
        problem = "What is #{num_1} #{operator} #{num_2}?"
        puts problem

        $input = gets.to_i
        $answer = num_1.send(operator, num_2)

        puts $input == $answer ? "You answered #{$input}, and the answer is #{$answer}! You are correct!" : "The answer is #{$answer}, not #{$input}! You are incorrect!"   

        puts "Would you like to do another question?"
        another = gets.chomp.to_s
        if another == "no"
            break
        end
    end
end

math_num

当用户输入＆＃34; no＆＃34 ;?时，如何终止这个Ruby`while`循环？

1 个答案: