Tutorial Moodle VPL Tips & Tricks
--D. Thiebaut (talk) 20:31, 11 June 2014 (EDT)
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This is a collection of tips, tricks, observations, recommendations, and modifications related to using VPL with Moodle.
Tips & Tricks
Output of Evaluate Step
- The output of the Evaluate action is a bit illogical:
+------------------------------+ | 3 tests run/ 0 tests failed | +------------------------------+
- To change it into something more intuitive, such as this:
+------------------------------+ | 3 tests run/ 3 tests passed | +------------------------------+
- we simply need to modify the code of vpl_evaluate.cpp on the moodle server, in /var/www/html/moodle/mod/vpl/jail/default_scripts (or whatever directory the vpl files reside).
- The diff of the modification is shown below:
1058,1059c1058,1060
< printf(">| %2d %s run/%2d %s failed |\n",
< nruns, nruns==1?stest[0]:stest[1], nerrors, nerrors==1?stest[0]:stest[1]);
---
> printf(">| %2d %s run/%2d %s passed |\n",
> nruns, nruns==1?stest[0]:stest[1], nruns-nerrors,
> (nruns-nerrors)==1?stest[0]:stest[1]);
Generating a vpl_evaluate.cases File
- Recommendations
- write a solution program first.
- run it on several cases you want to test your students' programs with.
- capture the outputs of the solution program on different cases. Copy paste into the vpl_evaluate.cases file. Don't worry yet about making it exactly correct.
- evaluate the solution program. You will get mismatches between the generated output and the expected output. Just copy/paste the generated output back into the vpl_evaluate.cases file. You will also be able to include the extra characters generated by the input statements.
- You should be ready to evaluate the solution program and get 100/100 as a grade.
