Task3

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
                Scanner s= new Scanner(System.in);
                operation o= new operation();
                int op;
                System.out.println("INDIAN BANK ATM");


                op=0;
                while (op != 4){
                    System.out.println("\n1. check balance");
                    System.out.println("2. deposit money");
                    System.out.println("3. withdraw money");
                    System.out.println("4.exit");
                    System.out.println("\nCHOOSE ONE OPTION");
                    op = s.nextInt();
                    if (op ==1){
                        o.checkbalance();
                    }
                    else if (op ==2){
                        o.deposit();
                    }
                    else if (op==3){
                        o.withdraw();
                    }
                    else if (op==4){
                        System.out.println("\nTHANKS FOR VISITING");

                    }
                    else{
                        System.out.println("INVALID INPUT");
                        System.out.println("TRY CHOOSING NUMBERS SUCH AS 1,2,3,4");
                    }
                }
            }
        }
        class operation{
            int bm=0;
            Scanner s= new Scanner(System.in);
            int dm,wm;
            public void checkbalance(){
                System.out.println("CURRENT BALANCE  : " +bm);
            }
            public void deposit(){
                System.out.println("ENTER AMOUNT TO DEPOSIT: ");
                dm = s.nextInt();
                if (dm >=0){
                    bm = bm+dm;
                    System.out.println(" SUCCESFUL");
                    System.out.println("CLOSING BALANCE: " +bm);
                }
                else{
                    System.out.println("FAILED");
                    System.out.println("TRY AGAIN ");
                }
            }
            public void withdraw(){
                System.out.println("ENTER AMOUNT TO WITHDRAW: ");
                wm = s.nextInt();
                if (wm <= bm){
                    bm= bm-wm;
                    System.out.println("SUCCESFUL");
                    System.out.println("CLOSING BALANCE: " +bm);
                }
                else {
                    System.out.println("FAILED");
                    System.out.println(" INSUFFICIENT BALANCE");
                    System.out.println("YOUR BALANCE IS :" +bm);
                    System.out.println("TRY AGAIN ");
                }
            }
        }