在Windows md-dos批处理文件中实现for循环或do while循环
我创建用户的代码如下：
@echo off
echo.
echo SELECT OPTION
echo -------------
echo.
:menu
echo 1- Create username
echo 2- Create password
echo 3- Delete username
echo 4- Exit
echo.
pause
set /p option=enter option 1 2 3 or 4:
if "%option%"=="1" goto createuser
if "%option%"=="2" goto createpass
if "%option%"=="3" goto deluser
if "%option%"=="4" goto exit
:createuser
echo Enter username
set /p var=Username:
net user %var% /add
echo Username successfully entered
goto exit
:createpass
echo Enter password
set /p var=Username:
net user %var% *
echo Password successfully entered
goto exit
:deluser
echo Enter user to be deleted
set /p var=Username:
net user %var% /del
echo User successfully deleted
goto exit
:exit
测试时它成功运行，但想知道如何成功实现 for 循环以查看用户是否输入数字 1-4 之外的任何选项（例如错误）。当成功添加用户时，如果他们想创建另一个用户或退出程序，还有一个 for 循环。
My coding for creating users is as follows:
@echo off
echo.
echo SELECT OPTION
echo -------------
echo.
:menu
echo 1- Create username
echo 2- Create password
echo 3- Delete username
echo 4- Exit
echo.
pause
set /p option=enter option 1 2 3 or 4:
if "%option%"=="1" goto createuser
if "%option%"=="2" goto createpass
if "%option%"=="3" goto deluser
if "%option%"=="4" goto exit
:createuser
echo Enter username
set /p var=Username:
net user %var% /add
echo Username successfully entered
goto exit
:createpass
echo Enter password
set /p var=Username:
net user %var% *
echo Password successfully entered
goto exit
:deluser
echo Enter user to be deleted
set /p var=Username:
net user %var% /del
echo User successfully deleted
goto exit
:exit
It successfully runs when tested but would like to know how to successfully implement a for loop to see if user enters any option outside of numbers 1-4 such as an error. Also a for loop for when a user has been successfully added, if they would like to create another user or exit the program.
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评论（2）
在每个部分之后，您可以将
goto exit更改为goto menu并在
:createuser之前添加After each section, you could change
goto exittogoto menuand addright before
:createuserfor 循环由以下部分组成：
- 用于计算循环次数的变量
-实际内容
- 增加循环计数器变量的行
- 如果循环计数器超过某个值，则执行 GOTO 跳出循环的 if 语句
-A 转到循环开头
类似于
while 循环的东西是一样的，只不过不是计算循环计数器，而是替换一些其他条件，例如
if %option%=="quit" GOTO Loopend希望您能根据此信息得到您想要的东西。抱歉，如果我的语法不完美，我不经常使用批处理文件。
A for loop consists of these parts:
-A variable for counting the number of loops
-Actual content
-A line that increments the loop counter variable
-An if statement that does a GOTO out of the loop if loop counter has exceeded some value
-A GOTO that goes to the beginning of the loop
Something like
A while loop is the same thing, except instead of counting a loop counter, you substitute some other conditional such as
if %option%=="quit" GOTO loopendHope you can get what you want based on this info. Sorry if my syntax isn't perfect, I don't use batch files very often.