Hi,
I've written a batch file to change the system date forward by 1 month on Win2008. Its for some testing I'm doing. However when its gets to september I get the following errorInvalid number. Numeric constants are either decimal (17),
hexadecimal (0x11), or octal (021).I know its because 08 and 09 are seen by DOS as octal numbers but Im pretty new to DOS and dont know how to fix it.
Here is my code, any assistance is much appreciated!
@echo off
set /a d=%date:~0,2%
set /a m=%date:~3,2%
set /a y=%date:~6,4%
:loop
set /a m+=1
if %m% gtr 12 (
set m=1
set /a y+=1
)
)
date %d%/%m%/%y%
echo %d%/%m%/%y%
Edit:Some clarification / fixes.
All you have to do about the octal is prefix a "1" subtract and it later.
You can't really trust the date variable, but anyway....
Your logic also doesn't account for the 29th,30th and 31st not being available in certain months.dd mm yyyy - dd mm yyyy (not available) 29 01 2010 - 29 02 2010 30 01 2010 - 30 02 2010 31 01 2010 - 31 02 2010It will be a very common problem in fact:
January -> February
March -> April
May -> June
August -> September
October -> NovemberAll could fall from the same issue and it is still the same below. I'm not sure of how you would even want to deal with it (roll over again to the first? Use the last day?).
@echo off set d=%date:~0,2% set m=%date:~3,2% set y=%date:~6,4% :loop set /a m=1%m% + 1 if %m% gtr 112 ( set m=01 set /a y+=1 ) else set m=%m:~1% date %d%/%m%/%y% echo %d%/%m%/%y%
that worked perfectly, thanks! I dont have to worry about the day as the testing im doing just needs to be done 1 day a month eg
16 dec 2010
16 jan 2011
16 feb 2011thanks again.
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