Ruby初学者：代码只重复2次

嘿，我创建的代码只重复了2次。 在我为“continue\u question”方法第二次键入“y”之后，代码只会停止

def greeting  
  puts "Hello! Please type your name: "  
  name = gets.chomp.capitalize  

  puts "It is nice to meet you #{name}.  I am a simple calculator application."  
  puts "I can add, subtract, multiply, and divide."  
end  

greeting  

def calculator  

    puts "First number: "  
    @n1 = gets.chomp.to_i  
    puts "Secons number: "  
    @n2 = gets.chomp.to_i  

def calculation
  puts "Type 1 to add, 2 to subtract, 3 to multiply, or 4 to divide two numbers: "
  operation_selection = gets.chomp.to_i  

    if operation_selection == 1  
      @result = @n1 + @n2  
    elsif operation_selection == 2  
      @result = @n1 - @n2  
    elsif operation_selection == 3  
      @result = @n1 * @n2  
    elsif operation_selection == 4  
      @result = @n1 / @n2  
    else  
      puts "Something went wrong!"  
      calculation  
    end  
end  

calculation  

puts "Your Result is #{@result}"  
end  

calculator  

def continue_question  
puts "Do you want to continue? (y/n)"  
continue = gets.chomp.to_s  

if continue == "y"  
  calculator  
  elsif continue == "n"  
  puts "Bye!"  
else  
  puts "What?"  
  continue_question  
end  
end  

continue_question 

---

问题是

continue\u question

只在代码末尾执行一次，但需要循环直到用户退出（即键入

n

）

因此，只需在

continue\u question

中添加一个循环，例如：

def continue_question 
  continue = "y" 

  until continue == "n" do
    puts "Do you want to continue? (y/n)"  
    continue = gets.chomp.to_s  

    if continue == "y"  
      calculator  
    elsif continue == "n"  
      puts "Bye!"  
    else  
      puts "What?"  
    end
  end
end 

---

您的代码不会重复2次，而是重复一次

原因是在您的

continue\u question

方法中，您没有告诉它再次重复：

def continue_question
  puts "Do you want to continue? (y/n)"
  continue = gets.chomp.to_s

  if continue == "y"
    calculator # <-- This causes it it repeat ONCE!
  elsif continue == "n"
    puts "Bye!"
  else
    puts "What?"
    continue_question
  end
end

嘿，我创建的代码只重复了2次

我想你误解了以下几点：

if continue == "y"  
  calculator  
  elsif continue == "n"  
  puts "Bye!"  

---

当您调用上述函数

计算器

时，您仍在执行

continue\u question

函数。因此，当

计算器

完成执行时，

continue\u question

也将完成，程序将停止。对于想要的结果，您可以尝试使用.< /p>，您也可以考虑使用<代码>而或<代码>循环< /代码>，而不是像这样递归调用方法。然而，这是一个更大的重构，可能超出了您最初问题的范围。

if continue == "y"  
  calculator  
  elsif continue == "n"  
  puts "Bye!"