📦 Inventory Management System (C)

A simple Inventory Management System implemented in C using file handling.
This project manages Items, Purchases, and Sales with full CRUD operations.

📑 Table of Contents

• Features
• Project Structure
• Data Files
• Item File Structure
• Purchase File Structure
• Sales File Structure
• How to Compile & Run
• Technologies Used
• Future Enhancements

⭐ Features

🔹 Core Operations

Each module supports: - Insert a Record - Edit a Record - Delete a Record - View Records

🔹 Modules

• Item Module
• Purchase Module
• Sales Module

🔹 Additional Logic

• Automatic stock update during purchase and sales
• Calculation of amount, rate, tax
• Binary file handling for persistent data

🏗 Project Structure

📁 Inventory-Management-System
│── main.c
│── item.c
│── purchase.c
│── sales.c
│── itemfile.dat
│── purchasefile.dat
│── salesfile.dat
│── README.md

📁 Data Files Used

• itemfile.dat -- Stores item details
• purchasefile.dat -- Stores purchase records
• salesfile.dat -- Stores sales records

📦 Item File Structure

No Field Variable Type

---

1 Item Code it_code int 2 Item Name it_name char[20] 3 Item Price it_price int 4 Opening Stock it_os int 5 Closing Stock it_cs int

🛒 Purchase File Structure

No Field Variable Type

---

1 Purchase Number p_no int 2 Purchase Date p_date char[20] 3 Client Code c_code int 4 Client Name c_name char[20] 5 Product Code p_code int 6 Purchase Quantity p_qty int 7 Purchase Price p_price int 8 Purchase Amount p_amt int

🧾 Sales File Structure

No Field Variable Type

---

1 Bill Number b_no int 2 Bill Date b_date char[10] 3 Product Code p_code int 4 Quantity b_qty int 5 Rate b_rate int 6 Tax b_tax int 7 Amount b_amt int

▶️ How to Compile & Run

Compile:

gcc main.c item.c purchase.c sales.c -o inventory

Run:

./inventory

⚙️ Technologies Used

• C Programming Language
• File Handling (binary)
• Modular Programming
• CRUD Operations

📊 Stock Update Logic

closing_stock = opening_stock + purchase_quantity - sales_quantity

🚀 Future Enhancements

• Add login authentication
• Implement searching & sorting
• Generate formatted reports
• Export data to CSV
• Add GUI version

📜 License

Open-source and free to use.