Untitled

#include <iostream>
#include <cstdlib>
using namespace std;

#define EXIT_MENU 0
#define WRONG_SELECT 1
#define MENU_SELECT 2
#define MAX_TRY 3
#define MAX_ID_LIMIT 999999999LL
#define MIN_ID_LIMIT 100000000LL
#define MAX_CREDIT_LIMIT 9999
#define MIN_CREDIT_LMIT 1000
#define LOGO_SIZE 9


void main_menu();
void second_menu();
int render_main_menu();
char render_second_menu();
int main_menu_handelr();
int second_menu_handler();
void read_email();
bool is_alpha_num(char);
void read_id();
void read_credit();
void leaving_service(int);
int random_generator(int min, int max);
void payment();
void identification();
void cheking_age();
void register_client();
void leave_company();
void logo_company();
void human_conaction();

int main()
{
    // Reading id
    identification();
    read_id();
    main_menu();

    return 0;
}

void main_menu() {
    int menu_result = MENU_SELECT, counter = 0;
    while (menu_result != EXIT_MENU)
    {
        menu_result = main_menu_handelr();
        if (menu_result == WRONG_SELECT && ++counter > MAX_TRY)
            break;
        else
            counter = 0;
    }
    leaving_service(counter);
}
int main_menu_handelr()
{
    int select = render_main_menu();
    switch (select)
    {
    case 1:
        register_client();
        return MENU_SELECT;
    case 2:
        second_menu();
        return MENU_SELECT;
    case 3:
        leave_company();
        return MENU_SELECT;
    case 4:
        return EXIT_MENU;
    default:
        return WRONG_SELECT;
    }
    return EXIT_MENU;
}

void second_menu() {
    int menu_result = MENU_SELECT;
    int counter = 0;
    while (menu_result != EXIT_MENU)
    {
        menu_result = second_menu_handler();
        if (menu_result == WRONG_SELECT && ++counter > MAX_TRY)
            break;
    }
    leaving_service(counter);
}

void register_client() {
    identification();
    cheking_age();
    read_email();
    read_credit();
    cout << "Thank you for choosing our company and welcome! Our people will contact youshortly!" << endl;
}

void leave_company() {
    cout << "You must speak with a service representative, please leave an email so that we can get back to you." << endl;;
    cout << "Enter your email:\n";
    read_email();
    cout << "We are sorry to hear you are unhappy. We will contact you in the next " << random_generator(72, 168) << "hours.\n";

}

int render_main_menu()
{
    int select;
    cout << "Thank you for choosing SCE Internet Company! How can we help you?" << endl;
    cout << "" << endl;
    cout << "\n\t\tMENU :" << endl;
    cout << "Press 1\nI want to join your company as a new client." << endl;
    cout << "" << endl;
    cout << "Press 2\nI want to find out some details about my already existing account." << endl;
    cout << "" << endl;
    cout << "Press 3\nI want to leave your company." << endl;
    cout << "" << endl;
    cout << "Press 4\nI want to exit the chat." << endl;

    cin >> select;
    getchar();
    return select;
}

int second_menu_handler()
{
    char select = render_second_menu();
    switch (select)
    {
    case 'a':
        payment();
        return MENU_SELECT;
    case 'b':
        logo_company();
        return MENU_SELECT;
    case 'c':
        human_conaction();
        return MENU_SELECT;
    case 'd':
        return EXIT_MENU;
    default:
        return WRONG_SELECT;
    }
}

char render_second_menu()
{
    char select;
    cout << "What information are you after?" << endl;
    cout << "" << endl;
    cout << "\n\t\tMENU :" << endl;
    cout << "Press a\nI would like to know how much I need to pay this month." << endl;
    cout << "" << endl;
    cout << "Press b\nI would like to know more about you." << endl;
    cout << "" << endl;
    cout << "Press c\nI would like to speak with a real human." << endl;
    cout << "" << endl;
    cout << "Press d\nI want to return to the main menu." << endl;

    cin >> select;
    return select;
}

void leaving_service(int counter)
{
    if (counter > MAX_TRY)
        cout << "Come back when you have something to do.\n";
    else
        cout << "nice to see you.\n";
}

// Services
void read_credit()
{
    int card_num = 0;

    cout << "Enter 4 last number of your card:" << endl;
    cin >> card_num;

    while (card_num > MAX_CREDIT_LIMIT || card_num < MIN_CREDIT_LMIT)
    {
        cout << "Error! Please try again:" << endl;
        cin >> card_num;
    }

    cout << "Correct" << endl;
    getchar();
}

void read_id()
{
    int long long id;

    cout << "Enter 9 digit id number:\n";
    cin >> id;

    while (id > MAX_ID_LIMIT || id < MIN_ID_LIMIT)
    {
        cout << "Error! Please try again:" << endl;
        cin >> id;
    }

    cout << "Correct" << endl;
    getchar();
}

bool is_alpha_num(char c)
{
    if (c <= '9' && c >= '0')
        return true;
    if (c >= 'a' && c <= 'z')
        return true;
    if (c >= 'A' && c <= 'Z')
        return true;
    if (c == '_')
        return true;
    return false;
}

void read_email()
{
    cout << "Enter your email" << endl;
    // @ flag
    bool domin_flag = false;
    // Bad Email
    bool bad_email = false;
    // Input char
    char input = 0, prev = 0;
    do
    {
        if (bad_email)
            cout << "Error! Please try again:" << endl;
        bad_email = domin_flag = false;
        input = prev = 0;
        while (input != ' ')
        {
            cin.get(input);
            if (!bad_email)
            {
                if (!is_alpha_num(input))
                {
                    // Dot case
                    if (input == '.' && prev == '.')
                        bad_email = true;
                    // @ case
                    if (input == '@')
                        if (domin_flag)
                            bad_email = true;
                        else
                            domin_flag = true;
                }
                prev = input;
            }
        }
        cin.get(input);
    } while (bad_email);
    cout << "Correct.\n";
}

void identification()
{
    cout << "Enter name and press '.' at the end:" << endl;
    bool strValid = false;
    while (!strValid)
    {
        char inputChar = getc(stdin);
        if (inputChar < 'A' || inputChar>'Z')
        {
            continue;
        }
        bool scanningActive = true;
        while (scanningActive)
        {
            char inputChar = getc(stdin);
            if (inputChar == '.')
            {
                strValid = true;
                break;
            }

            if (inputChar < 'a' || inputChar>'z')
            {
                break;
            }

        }

    }
    getchar();
}

void cheking_age()
{
    int age = 0;
    bool flag = 0;
    cout << "Enter your age:" << endl;
    cin >> age;

    while (age > 120 || age < 18)
    {
        flag == false;
        if (flag == false)
        {
            cout << "Your age is incorrect, Please try again:" << endl;
            cin >> age;
        }
    }
    cout << "Correct" << endl;
    getchar();

}

int random_generator(int min, int max) {

    srand(time(NULL));    //*Initialization of random*//
    int value = min + (rand() % (max - min));

    return value;
}

void payment() {
    read_credit();
    cout << " you have to pay " << random_generator(20, 100) << endl;
}

void logo_company()
{
    cout << "SCE Internet Company is a growing internet service company located in Israel. More details can be found in our website." << endl;
    int number = 0;
    cout << "Enter number between 3-9" << endl;
    cin >> number;
    for (int i = 0; i < LOGO_SIZE; ++i)
    {
        for (int j = 0; j < LOGO_SIZE; ++j)
        {

            if (number < 3 || number>9)
            {
                cout << "Error ,You entered an incorrect value: Try again." << endl;
                cin >> number;
                break;
            }

            if (i == 0 && j < number)
            {
                cout << "*";
            }

            if (i == 1 && j == 0)
            {
                cout << "*";
            }

            if (i == 2 && j < number)
            {
                cout << "*";
            }

            if (i == 3)
            {
                if (j == number - 1)
                {
                    cout << "*";
                }
                else
                    cout << " ";
            }

            if (i == 4 && j < number)
            {
                cout << "*";
            }
        }
        cout << endl;
    }
}

void human_conaction()
{
    cout << "We apologize, there is no service representative available right now, please enter your email so we can get back to you as soon as possible." << endl;
    read_email();
    {
        cout << "We will contact you in the next 48 hours." << endl;
    }

}