ATM_Interface.java

import java.util.Scanner;

class BankAccount {
    private double balance;

    public BankAccount(double initialBalance) {
        balance = initialBalance;
    }

    public double getBalance() {
        return balance;
    }

    public void deposit(double amount) {
        balance += amount;
        System.out.println("Deposited: Rs " + amount);
    }

    public void withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
            System.out.println("Withdrawn: Rs " + amount );
        } else {
            System.out.println("Insufficient funds. Withdrawal failed.");
        }
    }
}

class ATM {
    private BankAccount bankAccount;

    public ATM(BankAccount account) {
        bankAccount = account;
    }

    public void displayMenu() {
        System.out.println("Welcome to the ATM!");
        System.out.println("1. Check Balance");
        System.out.println("2. Deposit");
        System.out.println("3. Withdraw");
        System.out.println("4. Exit");
    }

    public void processOption(int option, Scanner sc) {
        switch (option) {
            case 1:
                System.out.println("Your balance is: Rs " + bankAccount.getBalance());
                break;
            case 2:
                System.out.print("Enter deposit amount: Rs ");
                double depositAmount = sc.nextDouble();
                bankAccount.deposit(depositAmount);
                break;
            case 3:
                System.out.print("Enter withdrawal amount: Rs ");
                double withdrawAmount = sc.nextDouble();
                bankAccount.withdraw(withdrawAmount);
                break;
            case 4:
                System.out.println("Thank you for using the ATM. Goodbye!");
                System.exit(0);
                break;
            default:
                System.out.println("Invalid option. Please try again.");
        }
    }
}

public class ATM_Interface {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter initial balance: Rs 3");
        double initialBalance = sc.nextDouble();

        BankAccount account = new BankAccount(initialBalance);
        ATM atm = new ATM(account);

        while (true) {
            atm.displayMenu();
            System.out.print("Enter option: ");
            int option = sc.nextInt();
            atm.processOption(option, sc);
        }
    }
}