using the C$++$ code #include

#include

#include

using namespace std;

#define MAX$\_$USERS $3//$ Constant for the maximum number of users

struct User $//$ Structure for users info

$\{$

int id;

char name$[50]$;

string password;

double balance;

string transactionHistory;

$\}$;

$//$ Function prototypes for operations in the ATM system

void displayMenu$($User acc$[],$ int userId$)$;

void login$($User acc$[])$;

void withdraw$($User &acc$)$;

void transfer$($User &acc, User accList$[],$ int userCount$)$;

void checkBalance$($User &acc$)$;

void generateSlip$($User &acc$)$;

void quit$()$;

int main$()$

$\{$

User acc$[3]$; $//$ Array For User accounts

$//$ Open the file and read user data

ifstream read;

read.open$("$acc$.$txt$")$;

if $(!$read$)$

$\{$

cout $<<$ "Error opening file!" $<<$ endl;

$\}$

$//$ Read user data from the file

for $($int i $=0$; i $<3$; i$++)$

$\{$

read $>>$ acc$[$i$].$id;

read.ignore$()$;

read.getline$($acc$[$i$].$name, $50)$;

read $>>$ acc$[$i$].$password;

read $>>$ acc$[$i$].$balance;

read.ignore$()$;

getline$($read$,$ acc$[$i$].$transactionHistory$)$;

$\}$

$//$ Close the file

read.close$()$;

$//$ Start the login process

login$($acc$)$;

$\}$

$//$ Function to handle user login

void login$($User acc$[])$

$\{$

int id;

string password;

bool loggedIn $=$ false;

int userId;

$//$ Loop until the user successfully logs in

while $(!$loggedIn$)\{$

cout $<<$ "Enter your ID: $"$;

cin $>>$ id; $//$ Read user ID

cout $<<$ "Enter your password: $"$;

cin $>>$ password; $//$ Read user password

for $($int i $=0$; i $<3$; i$++)$

$\{$

if $($acc$[$i$].$id $==$ id && acc$[$i$].$password $==$ password$)$

$\{$

loggedIn $=$ true;

userId $=$ i;

break;

$\}$

$\}$

if $(!$loggedIn$)$

$\{$

cout $<<$ "Invalid ID or password. Please try again." $<<$ endl;

$\}$

$\}$

$//$ Display the main menu after successful login

displayMenu$($acc$,$ userId$)$;

$\}$

$//$ Function to display the main menu

void displayMenu$($User acc$[],$ int userId$)$

$\{$

int option; $//$ Variable to store the user's menu selection

do $\{$

$//$ Display menu options

cout $<<"----------------------------------------------"<<$ endl;

cout $<<$ "Welcome to MAYBANK ATM BANKING SYSTEM, $"<<$ acc$[$userId$].$name $<<"!"<<$ endl;

cout $<<"1.$ Withdraw" $<<$ endl;

cout $<<"2.$ Transfer" $<<$ endl;

cout $<<"3.$ Check Balance" $<<$ endl;

cout $<<"4.$ Generate Slip" $<<$ endl;

cout $<<"5.$ Quit" $<<$ endl;

cout $<<"----------------------------------------------"<<$ endl;

cout $<<$ "Enter your option: $"$;

cin $>>$ option;

switch $($option$)\{$

case $1$:

withdraw$($acc$[$userId$])$;

break;

case $2$:

transfer$($acc$[$userId$],$ acc, MAX$\_$USERS$)$;

break;

case $3$:

checkBalance$($acc$[$userId$])$;

break;

case $4$:

generateSlip$($acc$[$userId$])$;

break;

case $5$:

quit$()$;

default:

cout $<<$ "Invalid option. Please try again." $<<$ endl;

$\}$

$\}$ while $($option $!=5)$;

$\}$

$//$ Function to handle money withdrawal

void withdraw$($User &acc$)\{$

double amount;

cout $<<$ "Enter amount to withdraw: $"$;

cin $>>$ amount;

if $($amount $>$ acc.balance$)$

$\{$

cout $<<$ "Insufficient balance." $<<$ endl;

$\}$

else

$\{$

acc.balance $-=$ amount;

acc.transactionHistory $+=$ "Withdraw: $"+$ to$\_$string$($amount$)+"$

$"$;

cout $<<$ "Withdrawal successful. New balance: $"<<$ acc.balance $<<$ endl;

$\}$

$\}$

$//$ Function to handle money transfer

void transfer$($User &acc, User accList$[],$ int userCount$)$

$\{$

int targetId;

double amount;

cout $<<$ "Enter the ID of the account to transfer to: $"$;

cin $>>$ targetId;

cout $<<$ "Enter amount to transfer: $"$;

cin $>>$ amount;

if $($amount $>$ acc.balance$)$

$\{$

cout $<<$ "Insufficient balance." $<<$ endl;

$\}$

else

$\{$

bool found $=$ false;

for $($int i $=0$; i $<$ userCount; i$++)\{$

if $($accList$[$i$].$id $==$ targetId$)\{$

fou