Moodle plugins directory: Virtual programming lab

I don't know a easy way to test this type of program. I can imagine making a something similar to a facade pattern that replaces the API you are using to log and test the student's program behavior. But I also think it may be a hard and fragile way to test student's programs.
Best regards,
Juan Carlos.

Hi Juan,
Is there a support in VPL for Visual Basic?
Thank you,
Meir

Hi'

I'm not sure it's worth mentioning, I've modified locally the vpl_evaluate.cpp to cope with dot '.' in program output compared to expected output in vpl_evaluate.cases Else, punctuation ("Hi.") is confused with numbers (".5").
Here some explanation with a short example.
Suppose we want to test a program "+1" with the test.case :

Case = Test zero
input = 0
output = 1

Here a program solution (in C) :

int main() {
int n;
scanf("%d",&n);
printf("%d",n+1);
return 0;}

You can even give better solution :

int main() {
int n;
printf("Give a number ");
scanf("%d",&n);
printf("+1 : %d",n+1);
return 0;}

It works! VPL find the 0 and the 1 of the test.case. Great! It was not sure because of extra texts ("Give ..." and "+1 :"), but VPL skip these texts

But it does not work for :

int main() {
int n;
printf("Give a number.");
scanf("%d",&n);
printf("+1 : %d",n+1);
return 0;}

What's the difference? The difference is in the dot "." in the text "Give a number."! VPL think there is a number here...
The problem is in vpl_evaluate.cpp isNumStart

bool NumbersOutput::isNumStart(char c){
if(isdigit(c)) return true;
return c=='+' || c=='-' || c=='.';}

Yes, some numbers .5, .0, ... begin with a dot ".", but "." alone?
So I've changed it to :

bool NumbersOutput::isNumStart(char c){
if(isdigit(c)) return true;
return c=='-' ;}

And now, last program works. (but ".5" are to be written "0.5")

Best for you,
Denis B.

ps: There must be other solutions with better lexical analysis to recognize true numbers.

Hi all,
All done for my VPL, but when in my code python, using third party (example: stdio.py), (import stdio), i do not know where can i put the file stdio.py on Server of JAIL.
Thanks!!!

Hello Denis B.
your comment is a bug that has been fixed in the 3.3. We use now a regular expression to detect numbers.
see
https://github.com/jcrodriguez-dis/moodle-mod_vpl/commit/b8fc63174337a883f8f973dc3497ef9698512e91#diff-730b93876f4d34ec69e467370ecaefe9

Hello Dan Nguyen Duc,
Install the third party package on the jail server and restart the service.
You also can add files to specific activities as "execution files" and remember to mark the files as "Files to keep when running".

Thank you Juan Carlos,
- add files to specific activities as "execution files" and remember to mark the files as "Files to keep when running": Ok - Done, but
- Install the third party package on the jail server and restart the service: Not done. In my server, i added third party to default package of Python, and test success on server when call function of third party.

Hi!

Is it possible to download all student submission attempts as zip for a particular user? Right now(v3.2.5) supports to download all latest submissions for all users.

Hi Tõnis,
the 3.2.5 version has not available this feature. The download of all the student's submissions is already implemented in the 3.3 version.

Best regards.

Hi
I have created the Jail Server but when I try to connect to the server via https I get a warning about the certificate, and then a 404 error. Does this mean that the server is being contacted but that the jail server software itself is not installed correct, or is this not an assumption I can make (that the certificate notification is not evidence of a successful connection to the physical server or URL)?

When I log in to the server via PuTTY and go to the root of the directory structure I can see a directory called jail; is this where it should be residing?

Sorry but not yet getting any OK message and trying to identify why not.

Hello Gildredge,
the certificate message may be due to the use of a selfsigned certificate.
The 404 message may be because you are not using the path /OK.
https://server[:SECURE_PORT]/OK

best regards.

To all the users of VPL
This comments system is apropiate for very simple questions.

Please, for user's questions/sugestions use the forum,
for installer's questions/bugs use github and give details about the version of plugin, jail server and jail server OS of your instalation

https://github.com/jcrodriguez-dis


Best regards,
Juan Carlos

Please, Is it possible to use IDPs as an online translator of Python, C ++?

Hello Oleksandr Szpinkowski,
I have searched about IDP assuming that it is "Intel® Distribution for Python". It seem a tool for accelerate Python on Intel's processors, notice that VPL is a learning tool. Really I dont know if the restrictions of the VPL excution server allow to execute the accelerated Python but you can try.
1) Install the IDP on a "Execution server" following the IDP home site instructions on how to install it on linux.
2) Restart the "Execution server"
3) Go to "Execution files" on a VPL activity and copy the default Python into vpl_run.sh and change it properly to use IDP instead of python3
https://github.com/jcrodriguez-dis/moodle-mod_vpl/blob/v3.3.2/jail/default_scripts/python-3_run.sh

Best regards.

The VPL module is excellent. I have been using it daily in my programming classes since 2015.