V1 - Initial Flashcard Concept - Single card creation and review.

V2 - Multi-card Support + Menu System - Loop added for multiple cards. - User rating system introduced.

V3 - File Persistence - Save/load flashcards to/from .dat files. - Basic memory tracking added.

V4 - Spaced Repetition Logic - Cards shown based on familiarity. - Editable flashcards.

V5 - Card Deletion and Cleanup - Cards can be deleted. - Review marks system improved.

Final - Full Application - All features integrated, bugs fixed, code cleaned. - Menu with full functionality and UI flow.