bank.java

class Bank {
    String name;
    int accno;
    double p;

    public Bank(String name, int accno, double p) {
        this.name = name;
        this.accno = accno;
        this.p = p;
    }

    public void display() {
        System.out.println("Name: " + name);
        System.out.println("Account Number: " + accno);
        System.out.println("Principal Amount: " + p);
    }
}

class Account extends Bank {
    double amt;

    public Account(String name, int accno, double p, double amt) {
        super(name, accno, p);
        this.amt = amt;
    }

    public void deposit() {
        p = p + amt;
    }

    public void withdraw() {
        if (amt > p) {
            System.out.println("INSUFFICIENT BALANCE");
        } else {
            p = p - amt;
            if (p < 500) {
                double penalty = (500 - p) / 10;
                p = p - penalty;
            }
        }
    }

    public void display() {
        super.display();
        System.out.println("Transaction Amount: " + amt);
    }
}

public class Main {
    public static void main(String[] args) {
        Account account = new Account("John Doe", 12345, 1000.0, 300.0);

        System.out.println("Before Transaction:");
        account.display();

        account.deposit();
        System.out.println("After Deposit:");
        account.display();

        account.amt = 800.0; // Modify the transaction amount for withdrawal
        account.withdraw();
        System.out.println("After Withdrawal:");
        account.display();
    }
}