Mess Management System (C Project)

A modular Mess Management System written in C, designed for university-level project submission. The system uses a clean layered architecture with separate modules for students, meals, billing, file handling, and authentication. All student data is stored in a binary file (students.bin).

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Project Structure

MessSystem/
│
├── main.c
├── auth.c
├── student.c
├── meal.c
├── billing.c
├── file_handler.c
│
├── config.h
├── auth.h
├── student.h
├── meal.h
├── billing.h
├── file_handler.h
│
└── data/
    └── students.bin

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Features

1. Student Management

• Add new student
• View all students
• Update student room
• View individual student profile

2. Meal Management

• Add meals for each student
• Automatically updates meal count

3. Billing System

• Calculates bill based on number of meals
• Uses fixed meal rate (modifiable in config.h)
• Stores updated bill inside student record

4. File Handling

• Binary file based storage (students.bin)
• Safe read/write operations
• Auto-create data file if missing
• Search student by ID

5. Authentication (Simple Menu Based)

• Admin panel
• Student login (ID-based access)

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How It Works

Student Structure

Defined in config.h:

typedef struct {
    int id;
    char name[50];
    int room;
    int mealCount;
    float bill;
} Student;

Billing Formula

bill = mealCount × MEAL_RATE

You can change the meal rate from:

#define MEAL_RATE 50.0f

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How to Compile

If you're using GCC:

gcc main.c auth.c student.c meal.c billing.c file_handler.c -o mess

Then run:

./mess

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Admin Menu

1. Add Student
2. View Students
3. Update Room
4. Add Meal
5. Calculate Bills
0. Exit

Student Menu

1. View Profile
2. View Bill
0. Exit

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Data Storage

All data is stored in:

data/students.bin

This file is created automatically.

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Notes

• No password required for login.
• Admin and Student menus are separated.
• System is fully modular for easy maintenance.

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Future Improvements (Optional for Higher Marks)

• Add password-based login
• Add monthly meal reset
• Export bill report to text file
• Search student by name
• Delete student

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Conclusion

This Mess Management System demonstrates:

• Modular C programming
• File handling with binary data
• Menu-driven navigation
• Student and meal management
• Dynamic bill calculation

It is suitable for academic submission or extension as a real project.

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