Main.java

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        List<User> roommates = new ArrayList<>();
        ExpenseManager manager = new ExpenseManager();

        System.out.println("=== VIT Hostel Expense Splitter ===");
        
        System.out.print("How many roommates? ");
        int count = sc.nextInt();
        
        for (int i = 0; i < count; i++) {
            System.out.print("Enter name of roommate " + (i + 1) + ": ");
            roommates.add(new User(sc.next()));
        }

        System.out.println("\n--- Record an Expense ---");
        System.out.print("Enter total amount: ");
        double amount = sc.nextDouble();
        
        System.out.print("Who paid this? (Enter Name): ");
        String payerName = sc.next();

        // Find the user object for the payer
        User payer = null;
        for (User u : roommates) {
            if (u.getName().equalsIgnoreCase(payerName)) {
                payer = u;
                break;
            }
        }

        if (payer != null) {
            manager.splitExpense(amount, payer, roommates);
            
            System.out.println("\n--- Final Settlement Report ---");
            for (User u : roommates) {
                if (u.getBalance() < 0) {
                    System.out.printf("%s owes: ₹%.2f\n", u.getName(), Math.abs(u.getBalance()));
                } else if (u.getBalance() > 0) {
                    System.out.printf("%s is owed: ₹%.2f\n", u.getName(), u.getBalance());
                } else {
                    System.out.println(u.getName() + " is all settled up!");
                }
            }
        } else {
            System.out.println("Error: Payer name not found in roommate list.");
        }
        
        sc.close();
    }
}