为什么我的批处理文件回显数组名称和数字而不是字符串? [英] Why does my batch file echo the array name and number instead of the string?

问题描述

我在这里有这段代码，只是试图创建一个从随机数组中选择名称的文件.为什么输出不正确?

I have this code here simply trying to create a file that the name is chosen from a randomized array. Why does it output incorrectly?

代码:

@echo off

set i=0
for %%a in (Cow Dog Bird Fish Meerkat Cat) do (
   set /A i+=1
   set operator[!i!]=%%a
)
set /a operator=%random%%%4+1
set operator=!operator[%operator%]!

copy /y NUL %operator%>NUL

创建的文件的标题类似于！operator [3]！，而不是数组中的字符串之一.为什么会这样呢?感谢您的帮助！

The file created is titled something like !operator[3]! instead of one of the strings in the array. Why is this the case? Any help is appreciated!

推荐答案

Alex K在他的注释中指出了您的主要问题-您丢失了 setlocal enableDelayedExpansion .

Alex K identified your primary problem in his comment - you are missing setlocal enableDelayedExpansion.

但是您还有另一个问题-您的数组包含6个值，但是您正在随机选择1到4之间的索引，而不是1到6之间的索引.

But you have another problem - your array contains 6 values, but you are randomly selecting an index between 1 and 4 instead of between 1 and 6.

您应该使用 set/a operator =％random %%% i + 1 .请注意，与SET/A一起使用时，不需要扩展真实的环境变量.

You should use set /a operator=%random%%%i+1. Note that true environment variables do not need to be expanded when used with SET /A.

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