code

#include <iostream>h

#define usersSize 100

using namespace std;

struct account {
	string username;
	string password;
	string email;
};
struct transactions {
	float transactionAmount;
	string transactionType;
	string reciever;
};
struct user {
	int age;
	float balance;
	account userAccount;
	transactions userTransaction[100];
	bool frozen = 0;
	int accNum;
	string phoneNum;
	int transactionCount = 0;
};
int anotherUserIndex, thisUserIndex;

bool signup(user users[]);
bool findEmail(string email, user users[]);
bool findPhoneNum(string phoneNum, user users[]);
bool findAccNum(int accNum, user users[]);
bool login (user users[]);
bool findLogin(string email, string password,user users[]);
bool wrongEmail(string Email,user users[]);
bool wrongPassword(string password,user users[]);
bool weakPassword(string password, user users[]);
int main()
{
	char ans;
	user users[usersSize];

	while (!signup(users)) {
		cout << "Do you want to retry? (N/Y)" << endl;
		cin >> ans;
		if (ans == 'n' || ans == 'N')break;
	}
	while (!login(users)) {
		cout << "Do you want to retry? (N/Y)" << endl;
		cin >> ans;
		if (ans == 'n' || ans == 'N')break;
	}


}
//ask ahmed amr
bool signup(user users[]) {
	user temp;
	cout << "Enter your name: " << endl;
	cin >> temp.userAccount.username;
	cout << "Enter your email: " << endl;
	cin >> temp.userAccount.email;
	if (findEmail(temp.userAccount.email, users)) {
		cout << "This email already exists." << endl;
		return false;
	}
	if (temp.userAccount.email.find("@user.bank") == string::npos) {
		cout << "Invalid mail format." << endl;
		return false;
	}
	cout << "Enter your password: " << endl;
	cin >> temp.userAccount.password;
	if (weakPassword(temp.userAccount.password,users))
	{
			cout << "Weak password\n";
			return false;
	}
	cout << "Enter your age: " << endl;
	cin >> temp.age;
	if (temp.age < 21) {
		cout << "You must be 21 or above" << endl;
		return false;
	}
	cout << "Enter balance: " << endl;
	cin >> temp.balance;
	if (temp.balance < 200) {
		cout << "Minimum balance is 200 !" << endl;
		return false;
	}
	cout << "Enter phone number: " << endl;
	cin >> temp.phoneNum;
	if (findPhoneNum(temp.phoneNum, users)) {
		cout << "This phone number is already in use." << endl;
		return false;
	}
	temp.accNum = (rand() % 101) + 100;
	while (findAccNum(temp.accNum, users)) {
		temp.accNum = (rand() % 101) + 100;
	}
	for (int i = 0; i < usersSize; i++) {
		if (users[i].userAccount.email.empty()) {
			users[i] = temp;
		}
	}
}

bool findEmail(string email, user users[]) {
	for (int i = 0; i < usersSize; i++) {
		if (email == users[i].userAccount.email) {
			return true;
		}
	}
	return false;
}
bool findPhoneNum(string phoneNum, user users[]) {
	for (int i = 0; i < usersSize; i++) {
		if (phoneNum == users[i].phoneNum) {
			return true;
		}
	}
	return false;
}
bool findAccNum(int accNumber, user users[]) {
	for (int i = 0; i < usersSize; i++) {
		if (accNumber == users[i].accNum) {
			anotherUserIndex = i;
			return true;
		}
	}
	return false;
}
//Ask ziad abdelaziz
bool login(user users[])
{
	user temp;
	cout << "Please enter your email: \n";
	cin >> temp.userAccount.email;
	cout << "please enter your password: \n";
	cin >> temp.userAccount.password;
	if (findLogin(temp.userAccount.email, temp.userAccount.password, users))
	{
		cout << "Logged in successfully\n";
		return true;
	}
	else
	{
		cout << "Failed to login ";
		if (wrongEmail(temp.userAccount.email, users))
		{
			cout << "wrong email\n";
		}
		if (wrongPassword(temp.userAccount.password, users))
		{
			cout << "wrong password\n";
		}
		
	}
	
}
bool findLogin(string email, string password, user users[])
{
	for (int i = 0; i < usersSize; i++)
	{
		if (email == users[i].userAccount.email && password == users[i].userAccount.password)
		{
			return true;
		}
	}
	return false;
}
bool wrongEmail(string email, user users[])
{
	for (int i = 0; i < usersSize; i++)
	{
		if (email != users[i].userAccount.email)
		{
			return true;
		}
	}
	return false;
}
bool wrongPassword(string password,user users[])
{
	for (int i = 0; i < usersSize; i++)
	{
		if (password != users[i].userAccount.password)
		{
			return true;
		}
	}
	return false;
}
bool weakPassword(string password, user users[])
{
	if (password.size() <= 3)
	{
		return true;
	}
	return false;
}