Batch - Get the date from 8 days from now [duplicate] - date

Question

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Closed 2 years ago.
I'm trying to get the date from 8 days from now to navigate in a tree structure.
I've use this but I got a problem at the start of the new month (I got a negative number and thats logical) :
set annee=%date:~6,4%
set mois=%date:~3,2%
set jour=%date:~0,2%
set /a j8=%jour%-8
cd %annee%\%mois%\%j8%
Got you a solution to resolve my problem ?
Thanks in advance.

Answer 1

The easiest way will be with a polyglot script that embeds jscript.
Here's the dayAdder.bat that accepts only one argument - the days you want to add to the current date and prints the result:
#if (#X) == (#Y) #end /* JScript comment
#echo off
cscript //E:JScript //nologo "%~f0" %*
exit /b %errorlevel%
#if (#X)==(#Y) #end JScript comment */
var days=parseInt(WScript.Arguments.Item(0));
Date.prototype.addDays = function(days) {
var date = new Date(this.valueOf());
date.setDate(date.getDate() + days);
return date;
}
var date = new Date();
WScript.Echo(date.addDays(5));
WScript.Echo("Year: " + date.getFullYear());
WScript.Echo("Month: " + date.getMonth());
WScript.Echo("DayOfTeWEek: " + date.getDay());
examaple:
E:\scripts>dayAdder.bat 7
Sun Nov 8 16:27:48 UTC+0200 2020
Year: 2020
Month: 10
DayOfTeWEek: 2
DayOfTheMonth: 3
You can modify it in way that will be suitable for you.