Defining a changing variable

Question

I'm trying to create a variable that will link to others based off of a variable result, but can't seem to get it to work. Here's the code:

@echo off
set rollnumbera=10
set /a num=%random% %%rollnumbera +1
set "message=msg%num%"
set msg1=a
set msg2=b
set msg3=c
set msg4=d
set msg5=e
set msg6=f
set msg7=g
set msg8=h
set msg9=i
set msg10=j
echo %message%
echo %num%
pause

When I run it it displays the msg%num% result, but does not seem to be linking to the set msg#s. I'm wondering if there is a way to do that, or if an "if %num% == message number (echo message)" is required. This is just an ease of access question, but any advice would be appreciated.

I think you are looking for this: `call set "message=%%msg%num%%%"`, but this has to be moved below the message definitions; **or** you write `call echo %%%message%%%`... — aschipfl, Nov 28 '19 at 20:19
"Changing variable" **=** "array element" **->** https://stackoverflow.com/questions/10166386/arrays-linked-lists-and-other-data-structures-in-cmd-exe-batch-script/10167990#10167990 — Aacini, Nov 29 '19 at 17:27

score 0 · Accepted Answer · answered Nov 28 '19 at 16:59

The fixed code:

@echo off 
setlocal enabledelayedexpansion
set rollnumbera=10 
set /a num=(%random% %% rollnumbera)+1 
set msg1=a 
set msg2=b 
set msg3=c 
set msg4=d 
set msg5=e 
set msg6=f 
set msg7=g 
set msg8=h 
set msg9=i 
set msg10=j 
for %%a in ("!msg%num%!") do set message=%%a
echo %message% 
echo %num% 
pause

Defining a changing variable

1 Answers1