Food Ordering System

Domains/CompetitiveProgramming/Programs/Java/Flight_Management_System/FlightManagementSystem.java

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+import java.util.ArrayList;
+import java.util.Scanner;
+
+// Class to represent each Flight
+class Flight {
+    String flightNo;
+    String airline;
+    String source;
+    String destination;
+    int seatsAvailable;
+    double price;
+
+    Flight(String flightNo, String airline, String source, String destination, int seatsAvailable, double price) {
+        this.flightNo = flightNo;
+        this.airline = airline;
+        this.source = source;
+        this.destination = destination;
+        this.seatsAvailable = seatsAvailable;
+        this.price = price;
+    }
+
+    public void displayInfo() {
+        System.out.printf("%-10s %-15s %-15s %-15s %-10d ₹%.2f%n",
+                flightNo, airline, source, destination, seatsAvailable, price);
+    }
+}
+
+// Class for Flight Management System
+public class FlightManagementSystem {
+    private static ArrayList<Flight> flights = new ArrayList<>();
+    private static Scanner sc = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        int choice;
+        do {
+            System.out.println("\n========= ✈️ Flight Management System =========");
+            System.out.println("1. Add Flight");
+            System.out.println("2. View All Flights");
+            System.out.println("3. Search Flight");
+            System.out.println("4. Book Ticket");
+            System.out.println("5. Cancel Ticket");
+            System.out.println("6. Exit");
+            System.out.print("Enter your choice: ");
+            choice = sc.nextInt();
+            sc.nextLine(); // consume newline
+
+            switch (choice) {
+                case 1 -> addFlight();
+                case 2 -> viewFlights();
+                case 3 -> searchFlight();
+                case 4 -> bookTicket();
+                case 5 -> cancelTicket();
+                case 6 -> System.out.println("👋 Exiting Flight Management System. Goodbye!");
+                default -> System.out.println("❌ Invalid choice! Please try again.");
+            }
+        } while (choice != 6);
+    }
+
+    // Add flight
+    public static void addFlight() {
+        System.out.print("Enter Flight Number: ");
+        String flightNo = sc.nextLine();
+
+        System.out.print("Enter Airline Name: ");
+        String airline = sc.nextLine();
+
+        System.out.print("Enter Source: ");
+        String source = sc.nextLine();
+
+        System.out.print("Enter Destination: ");
+        String destination = sc.nextLine();
+
+        System.out.print("Enter Available Seats: ");
+        int seats = sc.nextInt();
+
+        System.out.print("Enter Ticket Price: ₹");
+        double price = sc.nextDouble();
+        sc.nextLine();
+
+        flights.add(new Flight(flightNo, airline, source, destination, seats, price));
+        System.out.println("✅ Flight added successfully!");
+    }
+
+    // View all flights
+    public static void viewFlights() {
+        if (flights.isEmpty()) {
+            System.out.println("⚠️ No flights available.");
+            return;
+        }
+
+        System.out.println("\n---------------- Flight List ----------------");
+        System.out.printf("%-10s %-15s %-15s %-15s %-10s %s%n",
+                "FlightNo", "Airline", "Source", "Destination", "Seats", "Price");
+        System.out.println("---------------------------------------------------------------");
+        for (Flight f : flights) {
+            f.displayInfo();
+        }
+    }
+
+    // Search flight by number or destination
+    public static void searchFlight() {
+        System.out.print("Search by (1) Flight Number or (2) Destination: ");
+        int option = sc.nextInt();
+        sc.nextLine();
+
+        boolean found = false;
+        if (option == 1) {
+            System.out.print("Enter Flight Number: ");
+            String num = sc.nextLine();
+            for (Flight f : flights) {
+                if (f.flightNo.equalsIgnoreCase(num)) {
+                    System.out.println("✅ Flight Found:");
+                    f.displayInfo();
+                    found = true;
+                }
+            }
+        } else if (option == 2) {
+            System.out.print("Enter Destination: ");
+            String dest = sc.nextLine();
+            System.out.println("Flights to " + dest + ":");
+            for (Flight f : flights) {
+                if (f.destination.equalsIgnoreCase(dest)) {
+                    f.displayInfo();
+                    found = true;
+                }
+            }
+        }
+
+        if (!found) System.out.println("❌ No matching flights found.");
+    }
+
+    // Book ticket
+    public static void bookTicket() {
+        System.out.print("Enter Flight Number to book: ");
+        String num = sc.nextLine();
+
+        for (Flight f : flights) {
+            if (f.flightNo.equalsIgnoreCase(num)) {
+                if (f.seatsAvailable > 0) {
+                    f.seatsAvailable--;
+                    System.out.println("🎟️ Ticket booked successfully for flight " + f.flightNo);
+                } else {
+                    System.out.println("❌ No seats available on this flight.");
+                }
+                return;
+            }
+        }
+        System.out.println("❌ Flight not found.");
+    }
+
+    // Cancel ticket
+    public static void cancelTicket() {
+        System.out.print("Enter Flight Number to cancel ticket: ");
+        String num = sc.nextLine();
+
+        for (Flight f : flights) {
+            if (f.flightNo.equalsIgnoreCase(num)) {
+                f.seatsAvailable++;
+                System.out.println("🧾 Ticket cancelled successfully for flight " + f.flightNo);
+                return;
+            }
+        }
+        System.out.println("❌ Flight not found.");
+    }
+}

Domains/CompetitiveProgramming/Programs/Java/Flight_Management_System/README.md

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+Flight Management System
+
+**Contributor:** lokhandeshreya165-prog
+
+Flight Management System in Java (console-based) — easy to understand and perfect for projects or practice.
+It allows you to add, view, search, book, and cancel flights using object-oriented programming concepts.
+✈️ Features
+
+✅ Add flight details
+✅ View all flights
+✅ Search flight by flight number or destination
+✅ Book and cancel tickets
+✅ Simple text-based interface (uses ArrayList for storage)

Domains/CompetitiveProgramming/Programs/Python/Food Ordering System/Food_ordering_system.py

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+# Food Ordering System in Python
+# Developed by ChatGPT (Console Based)
+
+class FoodItem:
+    def __init__(self, id, name, price):
+        self.id = id
+        self.name = name
+        self.price = price
+
+class FoodOrderingSystem:
+    def __init__(self):
+        self.menu = [
+            FoodItem(1, "Pizza", 250),
+            FoodItem(2, "Burger", 120),
+            FoodItem(3, "Pasta", 180),
+            FoodItem(4, "French Fries", 90),
+            FoodItem(5, "Cold Coffee", 80),
+            FoodItem(6, "Sandwich", 100)
+        ]
+        self.cart = []
+
+    def display_menu(self):
+        print("\n======= 🍴 MENU =======")
+        print("{:<5} {:<15} {:<10}".format("ID", "Item", "Price (₹)"))
+        print("-----------------------------")
+        for item in self.menu:
+            print("{:<5} {:<15} {:<10}".format(item.id, item.name, item.price))
+        print("-----------------------------")
+
+    def add_to_cart(self):
+        self.display_menu()
+        try:
+            item_id = int(input("Enter item ID to order: "))
+            quantity = int(input("Enter quantity: "))
+
+            for item in self.menu:
+                if item.id == item_id:
+                    self.cart.append({"item": item, "quantity": quantity})
+                    print(f"✅ {item.name} x{quantity} added to cart.")
+                    return
+            print("❌ Invalid item ID.")
+        except ValueError:
+            print("⚠️ Please enter a valid number.")
+
+    def view_cart(self):
+        if not self.cart:
+            print("🛒 Your cart is empty.")
+            return
+
+        print("\n======= 🧾 YOUR CART =======")
+        total = 0
+        print("{:<15} {:<10} {:<10}".format("Item", "Qty", "Price"))
+        print("--------------------------------")
+        for order in self.cart:
+            item = order["item"]
+            quantity = order["quantity"]
+            price = item.price * quantity
+            print("{:<15} {:<10} {:<10}".format(item.name, quantity, price))
+            total += price
+
+        gst = total * 0.05
+        grand_total = total + gst
+        print("--------------------------------")
+        print(f"Subtotal: ₹{total:.2f}")
+        print(f"GST (5%): ₹{gst:.2f}")
+        print(f"Total Bill: ₹{grand_total:.2f}")
+        print("--------------------------------")
+
+    def remove_item(self):
+        if not self.cart:
+            print("❌ Cart is empty.")
+            return
+
+        self.view_cart()
+        try:
+            item_name = input("Enter item name to remove: ").strip().lower()
+            for order in self.cart:
+                if order["item"].name.lower() == item_name:
+                    self.cart.remove(order)
+                    print(f"❎ {order['item'].name} removed from cart.")
+                    return
+            print("❌ Item not found in cart.")
+        except Exception as e:
+            print("⚠️ Error:", e)
+
+    def checkout(self):
+        if not self.cart:
+            print("🛒 Your cart is empty.")
+            return
+
+        self.view_cart()
+        print("💳 Thank you for your order! Enjoy your meal 😋")
+        self.cart.clear()
+
+    def main_menu(self):
+        while True:
+            print("\n========== 🍔 FOOD ORDERING SYSTEM ==========")
+            print("1. View Menu")
+            print("2. Add to Cart")
+            print("3. View Cart")
+            print("4. Remove Item")
+            print("5. Checkout")
+            print("6. Exit")
+
+            choice = input("Enter your choice: ")
+
+            if choice == '1':
+                self.display_menu()
+            elif choice == '2':
+                self.add_to_cart()
+            elif choice == '3':
+                self.view_cart()
+            elif choice == '4':
+                self.remove_item()
+            elif choice == '5':
+                self.checkout()
+            elif choice == '6':
+                print("👋 Thank you! Visit again!")
+                break
+            else:
+                print("❌ Invalid choice. Please try again.")
+
+
+# Run the system
+if __name__ == "__main__":
+    system = FoodOrderingSystem()
+    system.main_menu()

Domains/CompetitiveProgramming/Programs/Python/Food Ordering System/README.md

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+Food Ordering System
+**Contributer:** lokhandeshreya165-prog
+
+Food Ordering System in Python .
+It’s simple, menu-driven, and great for understanding Python OOP, lists, and dictionaries.
+
+🍽️ Features
+
+✅ Display food menu
+✅ Take customer orders
+✅ Generate bill with GST
+✅ Option to add/remove items
+✅ Simple text-based interface