是/否批处理文件 [英] yes/no batch file

问题描述

在我的批处理文件中，我想问用户一个问题.

In my batch file I want to ask the user a question.

我写了以下内容:

SET /P ANSWER=Click Y to continue or N to stop (Y/N)

但是我收到的消息没有最后一个).

but I get the message without the last ).

有人知道为什么吗?

谢谢！

推荐答案

因为您正在括号内的提示中使用该提示，例如

Because you're using that prompt within a parenthesised block, e.g.

if ... (
  ...
  set /P ANSWER=Blah (Y/N)
)

或

for %%x in (...) do (
  ...
  set /P ANSWER=Blah (Y/N)
)

在这种情况下，您必须转义右括号:

You have to escape the closing parenthesis in that case:

SET /P ANSWER=Click Y to continue or N to stop (Y/N^)

或引用整个参数:

SET /P "ANSWER=Click Y to continue or N to stop (Y/N)"

否则它将关闭该块.而且，如果在结束括号后还有其他内容，则会出现语法错误.

otherwise it closes the block. And if you had anything after that closing parenthesis you'd get a syntax error.

一种更简单的操作方法可能是choice命令:

An easier method of what you do there would probably be the choice command:

choice /M "Press Y to continue or N to stop" /c YN

然后您可以随后检查错误级别以找出用户的选择:

You can then check the errorlevel afterwards to find out the user's choice:

if errorlevel 255 (
  echo Error
) else if errorlevel 2 (
  echo No.
) else if errorlevel 1 (
  echo Yes.
) else if errorlevel 0 (
  echo Ctrl+C pressed.
)

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