💳 Billing System in C++

A simple yet powerful console-based Billing System developed in C++ using object-oriented programming. This system allows both customers and administrators to interact with product data, generate invoices, and manage billing operations with ease.

🛠️ Features

🔐 Admin Module

• Add new products with product number, name, and rate
• View all available products
• Modify existing product rates
• Delete products from the system

🛒 Customer Billing Interface

• View available products
• Select products and enter quantity
• Auto-generate a detailed invoice with:
  • Item-wise breakdown
  • Quantity × Rate
  • Total amount
  • Date & Time of purchase

📄 File Handling

• All products are stored in a file: Products.txt
• File is read and updated dynamically as per admin actions

👨‍💻 Object-Oriented Design

The project uses modular class-based architecture:

• Product
• Bill
• BillItems
• Invoice

🧱 Tech Stack

• Language: C++
• Compiler: GCC / g++
• Concepts Used: File Handling, OOP, Classes & Inheritance, CLI Menu Navigation