Windows Batch变量内的变量 [英] Windows Batch Variable within variable

问题描述

在Windows批处理中，您可以在变量中设置变量吗?

In windows batch could you set a variable within a variable?

解释:

因此％num％在变量内.

So the %num% is within the variable.

set num=5
set cnum=test
set h1=%c%num%%

是否可以使百分数像括号一样工作? 输出应为h1 = test

Is it possible to make the percents work like parenthesis? The output should be h1=test

任何帮助将不胜感激.

推荐答案

您在问题中遇到的例子一团糟，但我认为我明白您在寻找什么:

Your example in your question is a mess, but I think I understand what you are looking for:

@echo off
setlocal

set C1=apple
set C2=orange
set C3=banana

set num=2


:: Inefficient way without delayed expansion
:: This will be noticeably slow if used in a tight loop with many iterations
call echo %%C%num%%%

:: The remaining methods require delayed expansion
setlocal enableDelayedExpansion

:: Efficient way 1
echo(
echo !C%num%!

:: Efficient way 2 - useful if inside parenthesized block
:: where %num% will not give current value
echo(
for %%N in (!num!) do echo !C%%N!

:: Showing all values via a loop
echo(
for /l %%N in (1 1 3) do echo !C%%N!

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