Creating an online judge from scratch

Question

I\'ve participated in a few online programming contests and found the online judges used quite remarkable in functionality.

Coming to the point of the topic, my college

Answer 1

I am not sure what an online judge is, but I assume it is a piece of software to evaluate programs for correctness.

I would use some build, test and analysis libraries for this. Examples would be Ant, JUnit, and Checkstyle.

You would take the code provided by the participant, and drop it into a file. Use the build tool to compile it.

• build fails: 0 points
• build succeeds with warnings 1 point
• build succeeds without warnings 2 points

Then run some tests, that verify the correctness of the solution.

• For each test passed: 1 point

Finally run some code analysis utility to judge the quality of the code.

• minus 1 point for each complaint of the utility

Of course you might want to shift the point values to your needs.