Student Marks Management (C)

An interactive C program for recording, displaying, and managing classroom test marks.
It supports up to 35 students and 10 tests, provides PIN‑protected supervisor features,
and demonstrates structured C programming and input validation.

Note: Data is stored in memory only; this is an educational project

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Features

• Dynamic Class Setup

  • Prompt for number of students (1–35) and names (up to 50 chars).
  • Record marks for up to 10 tests per student.

• Teacher Menu

  • Enter Marks – input marks 0–100, with a correction pass before locking each test.
  • Display Marks – view a table of entered marks and running averages.

• Supervisor Mode (PIN‑protected, default 3750)

  • Change the supervisor PIN.
  • Add a student (up to the 35‑student limit).
  • Change an individual mark (even if locked).
  • Correct a student name.

• Data Validation & Locking

  • Marks validated to 0–100.
  • Once confirmed, a test’s marks are locked for teachers (but editable by the supervisor).

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Build

Use any C11‑compatible compiler (e.g. GCC, Clang):

gcc -std=c11 -O2 -Wall -Wextra -o student_marks student_marks_improved.c

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Run

./student_marks

1. Enter the number of students and their names.
2. Use the menu to enter marks, display marks, or access supervisor features.
3. Enter the supervisor PIN (default 3750) to unlock management functions.

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Example Session

Welcome to the Student Marks System
Enter number of pupils (1..35): 3
Enter the names of the pupils:
  Pupil 1 name: Alice
  Pupil 2 name: Bob
  Pupil 3 name: Charlie

Main Menu
 1) Enter marks
 2) Display marks
 3) Supervisor mode
 4) Exit program
Choose: 1

Entering marks for Test 1 (0 if no mark):
  Alice: 90
  Bob: 85
  Charlie: 78

Check & correct any mark before locking.
Correct a mark? 1=Yes 2=No: 2
Confirm and lock Test marks? 1=Yes 2=No: 1
Test 1 marks locked.

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Repository Structure

├── student_marks_improved.c   # Complete, improved C source code
└── README.md

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Skills Demonstrated

• C Programming – modular functions, arrays, input validation, and interactive menus.
• Access Control – PIN‑protected supervisor features.
• Software Engineering – clear documentation, testing evidence, and maintainable structure.

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Future Enhancements

• Persistent storage (CSV or database) to retain data across runs.
• Stronger security (hashed PIN, encryption of saved data).
• Expanded input validation and error handling.
• Unit tests and a Makefile or CI workflow for automated builds.

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Developed by Pritam Gurung