Receiving error after trying to find and load information from a file in Batch

Question

I've been doing some experimentation in batch and I'm currently working on the beginnings of a small text adventure, but when I was testing a savegame, the program returned the error "The system cannot find the file specified." Can somebody help me out? (If its any help I'm on a school computer).

Here's the snippet of my code in question:

pushd \schoolnameMyName$My DocumentsDiscount Zork
popd

< savegame.sav (    
  set /p timesPlayed
)

Any help would be appreciated greatly. Thanks in advance!

question from:https://stackoverflow.com/questions/65923627/receiving-error-after-trying-to-find-and-load-information-from-a-file-in-batch

Answer 1

I'm assuming that your intention will be to retrieve more than one value from your savegame.sav file, so perhaps changing your methodology from the outset would serve you well.

The first advice I'd provide is to always, prefix your in game variables with the same character. (In the example below, I've chosen {, and to improve the look, I've also suffixed them with }, which is optional)

To make sure that variables prefixed with that character, and already existing in the local environment, do not interfere with our game variables, we first of all disable them.

Now we create three labelled sections for showing all variables with their values, saving all variables to a file, and loading all variables from that file.

We can then call those labels as needed.

Here's a vary basic example to show them working:

@Echo Off
SetLocal EnableExtensions DisableDelayedExpansion

Rem Changing the current working directory, and pushing the previous to stack
PushD "\schoolnameMyName$My DocumentsDiscount Zork" 2> NUL || GoTo :EOF

Rem Disabling any predefined local variables beginning with {
For /F "Delims==" %%G In ('"(Set {) 2> NUL"') Do Set "%%G="

Rem Simulating first gameplay values for demonstration
Set /A {timesplayed}=3,{health}=80,{strength}=126,{defence}=76,{attack}=57

Rem showing values
Call :ShowVals

Rem saving values to file
Call :SaveVals

Rem zeroing variables for demostration
Set /A {timesplayed}={health}={strength}={defence}={attack}=0

Rem showing new values
Call :ShowVals

Rem loading saved values back into game
Call :LoadVals

Rem proving reloaded values
Call :ShowVals

Rem Returning to previous working directory from stack, and ending script
PopD
GoTo :EOF

:ShowVals
Set {
%SystemRoot%System32imeout.exe /T 7 1> NUL
Exit /B

:SaveVals
((Set {) 2> NUL) 1> "savegame.sav"
Exit /B

:LoadVals
For /F "UseBackQ Delims=" %%G In ("savegame.sav") Do Set "%%G"
Exit /B