obfuscated hello world won't print hello world

[NunoLava1998]

I'm trying to create a (very) obfuscated "Hello World!" in batch. However, this gives an error or displays nothing rather than displaying "Hello WorlD!"

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set/a_=5-4>nul&&set/a.=5-5>nul&&set "m=^%^t^m^p^:^~^5^,%_%%"&&set "q=%^t^m^p^:^~%.%,%_%%&&set "z=%^t^m^p^:^~6,%_%%&&set "v=%^c^o^m^s^p^e^c^:^~6,%_%%
%m%%q%Ho H%m%%z%%z%o Wor%z%%v%!

[ShadowThief]

What's it supposed to look like un-obfuscated?

[thefeduke]

this gives an error or displays nothing

Remarkable code. So which is it? An undisclosed error or no display? Or does it act differently based on some external influences?
Oh, where is my tongue-in-cheek icon?
John A.

[penpen]

I guess "%m%%q%Ho H%m%%z%%z%o Wor%z%%v%!" should be "echo Hello World!", and
the first line then has to set up the used environment variables.

I see two issues here:
1. Perctentage expansion is only appended once before a line of batch code is interpreted see:
http://stackoverflow.com/questions/4094699/how-does-the-windows-command-interpreter-cmd-exe-parse-scripts/4095133#4095133
You may use "call" to realize a second percentage expansion, but this has also other side effects (for example on the circumflex accent character):

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set "AB=de" && set "C=f" && set "ABF=xyz" && call set "D=%%AB%C%%%^"
echo D=%D%

2. Percentage expansion doesn't work the way you (NunoLava1998) assumes (like parentheses):
So "%AB%C%%" would not first expand %C% and then (assumed "%C%"== "f") %ABf%.

Instead percentage expansion first expands "%AB%" (to its value) and then "%%" (to "%").
For more information on percentage expansion see:
http://stackoverflow.com/questions/4094699/how-does-the-windows-command-interpreter-cmd-exe-parse-scripts/7970912#7970912.
(Same linked page as above, but different post.)


penpen

[misol101]

I'm having trouble with mine as well. How do I write a blank space instead of an underscore?

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@setlocal enabledelayedexpansion&@for /f "delims=" %%H in (%~n0.bat) do @for %%W in (53,2,4,8,5,124,79,30,36,14,16) do @set _=%%H&set /p ="!_:~%%W,1!"<nul

Edit: Ahh, here is a better version:

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@setlocal enabledelayedexpansion&@(for /f "delims=" %%H in (%~n0.bat) do @for %%W in (54,2,4,8,5,9,80,30,37,14,16) do @set _=%%H&set O_=!O_!!_:~%%W,1!)&set /p="!O_!^!"<nul