نظام درجات في لينكس بإستخدام Bash Script

A Bash-based command-line application for educational institutions to manage, analyze, and evaluate student grades efficiently. The system combines student record management with instant grade evaluation, offering educators a lightweight yet powerful tool for academic assessment .

### Key Features :

1. Comprehensive Student Management

- Add students with grades in multiple subjects (Math, Science, English)

- Calculate averages (individual and class-wide)

- Auto pass/fail classification (configurable threshold)

- Filter views (all students/passing/failing)

2. Quick Grade Evaluation

- Instant feedback for single grades

- Motivational messaging (Perfect/Excellent/Very Good tiers)

- Continuous mode (evaluate multiple grades without menu reloads)

3. Data Management

- Persistent storage (plaintext database)

-️ Bulk data deletion with confirmation

-️ Input validation (numeric grades, range checks)

4. Professional UX

-️ Terminal-based UI with clear menus

- Formatted tabular outputs

- Seamless navigation (press-any-key continuations)