Public C demo
Try the real exercise workspace
Read the published aff_a subject and edit C source without creating an account. Your changes are not saved, sent, compiled, run, or graded.
Exercise subject
aff_a
- Requirement
- Complete C programme
- Expected file
- aff_a.c
- Allowed functions
- write
Instructions
- Write a program that displays the lowercase letter a followed by a newline.
- The program does not need to process command-line arguments.
Example input and output
$ ./aff_a
a
aff_a.c
Tab: indent · Shift+Tab: outdent · Escape: release Tab key
Editor keys: Tab indent · Shift+Tab outdent · Escape release Tab to move focus. Shortcuts: Ctrl/Cmd+S save · Ctrl/Cmd+Enter preview public-test flow · Ctrl/Cmd+Shift+Enter announce final-submission status · Ctrl/Cmd+F search · Ctrl/Cmd+H search and replace · Ctrl/Cmd+/ toggle comment.
Evaluation roadmap
How code evaluation will work
This public demo keeps edits only in this page session. Its preview does not send, store, compile, execute, test, or grade the source.
01 · PUBLIC TESTS
Preview the future flow
A future isolated evaluator will compile C and run reviewed visible tests. This demo does not perform those operations.
02 · TRUSTED EVALUATION
Still unavailable
Real compilation, public and hidden tests, memory checks, scores, XP, levels, completion, and unlocking require the separate isolated C evaluator and trusted result ingestion.
Continue with c0den
Save an account-scoped local draft
An account opens the protected workspace, where a draft and in-progress activity can be restored in this browser and a source snapshot can enter the persisted mock submission flow. The mock does not activate compilation, testing, grading, trusted completion, XP, levels, unlocking, or cross-device sync.