SS64 Forum

blah01

Member

Registered: 23 Apr 2007

Posts: 2

problem with a variable inside for in a cmd script

hi all

At the begining i want to say that I'm new to the cmd scripts.
I have a problem with a variable inside a for loop. I'm reading data from a file:

season=spring summer autumn winter
month=january february march april may

This is a script code (it's only a test script):

@echo off

FOR /F "eol=# tokens=1,2 delims==" %%i in (%1) do  (
    if %%i == season SET SEASON=%%j
)

FOR /F "eol=# tokens=1,2 delims==" %%i in (%1) do  (
    if %%i == month SET MONTH=%%j
)

for %%i in ( %SEASON% ) DO (
      for %%j in ( %MONTH% ) do (
        set x=%%i\%%j
        REM echo %%i\%%j
        echo %x%
      )
)

The problem is that the x variable has at every iterance the same value:
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may
winter\may

While the commented echo %%i\%%j gives the correct result:
spring\january
spring\february
spring\march
spring\april
spring\may
summer\january
summer\february
summer\march
summer\april
summer\may
autumn\january
autumn\february
autumn\march
autumn\april
autumn\may
winter\january
winter\february
winter\march
winter\april
winter\may

Does anyone knows what is the problem?

blah01

Simon Sheppard

Admin

Registered: 27 Aug 2005

Posts: 1,130

Website

Re: problem with a variable inside for in a cmd script

You need to SETLOCAL EnableDelayedExpansion

see the SETLOCAL page
http://ss64.com/nt/setlocal.html

blah01

Member

Registered: 23 Apr 2007

Posts: 2

Re: problem with a variable inside for in a cmd script

thx this has solved my problem