🍽️ Meal Order Management System

A lightweight, console-based C++ application designed to handle meal bookings for cafeterias, dining halls, or hostels. This system features user authentication, dynamic menu selection, and persistent file-based storage for managing daily lunch and dinner orders.

✨ Features

• User Authentication: Secure sign-up and login functionality. User credentials are saved locally to prevent unauthorized access.
• Menu Browsing & Selection: Users can view separate menus for Lunch and Dinner, featuring items like Chicken Curry, Beef Curry, and Fish Fry.
• Automated Billing: Automatically calculates the total cost of the meal, factoring in a base dining fixed cost plus the prices of individual selected items.
• Order Management: * Book a Meal: Save order details including name, selected items, hall, and precise timestamp.
  • Search Bookings: Quickly retrieve order details by querying the user's name.
  • Cancel Bookings: Remove existing orders from the system easily.
• Persistent Storage: Utilizes C++ file handling (fstream) to save all users to users.txt and all active orders to bookings.txt. Bookings are automatically sorted chronologically.
• Cross-Platform UI: Includes pre-processor directives to cleanly clear the console on both Windows (cls) and Unix/Linux/macOS (clear) environments.

🛠️ Technologies Used

• Language: C++ (C++11 or higher recommended)
• Standard Template Library (STL): Utilizes std::vector, std::map, and std::unordered_map for efficient data handling and menu sorting.
• File I/O: std::ifstream and std::ofstream for persistent data management.
• Time Library: <ctime> for generating real-time booking timestamps.

🚀 Getting Started

Prerequisites

You will need a C++ compiler installed on your system, such as GCC (g++) or MSVC.

Compilation & Execution

1. Clone this repository to your local machine:

   git clone https://github.com/YourUsername/Meal-Order-Management-System.git

2. Navigate to the project directory:

   cd Meal-Order-Management-System

3. Compile the source code using g++:

   g++ main.cpp -o MealSystem

4. Run the compiled executable:
   • On Windows:

     MealSystem.exe

   • On Linux/macOS:

     ./MealSystem

📂 File Structure

• main.cpp: The core application code containing all classes (User, Authentication, MealBookingSystem) and application logic.
• users.txt: (Auto-generated) Stores registered usernames and passwords.
• bookings.txt: (Auto-generated) Stores all active meal bookings in a comma-separated format.
• temp.txt: (Temporary) Used briefly by the system during the cancellation process to safely update the bookings list.

📝 Usage Guide

1. Launch the app and select Sign Up to create an account.
2. Log In using your newly created credentials.
3. Select Book a Meal, input your name, choose between Lunch or Dinner, and enter the item numbers you wish to eat (separated by spaces).
4. Enter your designated hall. The system will print a detailed receipt with your total cost.
5. Use the main menu to Search or Cancel your booking if your plans change.