🛒 Supermarket Billing System

A simple C++ console-based application to simulate a basic supermarket billing system. It includes administrator and buyer functionalities, and manages a text-based inventory database.

📋 Features

🔐 Administrator

• Add new products to the database
• Modify existing products
• Delete products from the database
• Secure login using email and password

🧾 Buyer

• View product list
• Place orders with quantities
• Generate bill with discount calculations

📂 File Structure

⚙️ How It Works

1. Start the application
2. Choose between:
   • Administrator login (email: abc123@gmail.com, password: abc12345)
   • Customer access
3. Perform actions like adding/modifying/deleting items (Admin) or purchasing items (Buyer).
4. Bills are generated with price and discount details.

📌 Requirements

• C++11 or higher
• Compatible C++ compiler (e.g., GCC, Clang, MSVC)

🧪 Compilation & Execution

On Linux/Mac

g++ main.cpp -o supermarket
./supermarket

🚧 Known Issues
Use of goto and label statements — not recommended in modern C++

Use of plain text files (database.txt) instead of structured storage

Minimal input validation

UI is purely console-based

🛠 Future Improvements
Replace goto with proper loops/functions

Migrate to a structured file format like CSV or use SQLite

Add product categories, stock management, and search functionality

Improve UI with better formatting

Add persistence using OOP techniques (e.g., serialization)