在不使用XML库的情况下在Haskell中创建一个xml文件 [英] Create an xml file in Haskell without using XML library

问题描述

我是Haskell的一个完整noob，我正在尝试做一个项目。
我需要能够根据用户输入创建一个xml。
例如

我询问用户是否要输入名称，如果他们选择yes，那么它应该创建一个简单的xml

 < person> 
<名称>选择的名称< /名称> 
< / person> 
  

关于如何实现这一点的任何想法？必须在不使用xml库的情况下完成

非常感谢您提供任何答案

我没有做太多的事情，因为我不知道如何继续，这是我迄今为止所做的工作。

  main = do 
 putStrLn你想添加一个人吗？ 
 putStrLn1 =是
 putStrLn2 =否
 choice< -getLine 
 
  - 某些if语句可以决定做什么下一个
  

我也试着用这种方式追加文件

  createName = appendFileaddPerson.xmlopenName 
 openName =< name> 
  

但我需要在用户输入名称时调用它

解决方案

我会给你一些提示：

  main = do 
 putStrLn你想添加一个人吗？ 
 putStrLn1 =是
 putStrLn2 =否
 choice<  -  readLn 
 
的案例选择1  - >做
 ...  - 添加一个人
 2  - >做
 ...  - 不要添加一个人
 _  - >做
 ...  - 用户输入了无效输入
  

我建议您阅读向您学习Haskell for Great Good ，以便学习基本的Haskell语法和习惯用法。

I am a complete noob at Haskell and I am trying to do a project. I need to be able to create an xml based on the user input. For example

I ask a user if they want to enter a name, if they choose yes, then it should create this as a simple xml

<person>
     <name>Chosen name</name>
</person>

Any idea on how I can achieve this? This has to be done without using xml libraries

Thank you so much in advance for any answers

I havent really done much as I am not sure how to proceed, this is what I've done so far

main = do   
    putStrLn   "Would you like to add a person?"
    putStrLn   "1 = Yes"
    putStrLn   "2 = No"
    choice <-getLine

    --some sort of if statement here to decide what to do next

I have also tried to append file this way

createName = appendFile "addPerson.xml" openName
openName = "<name>"

but I need this to be called once they user enters their name

解决方案

I'll give you a little bit of a hint:

main = do   
    putStrLn "Would you like to add a person?"
    putStrLn "1 = Yes"
    putStrLn "2 = No"
    choice <- readLn
    case choice of
        1 -> do
            ... -- Add a person
        2 -> do
            ... -- Do not add a person
        _ -> do
            ... -- The user entered an invalid input

I recommend that you read Learn you a Haskell for Great Good so that you can learn basic Haskell syntax and idioms.

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