ATM

#include <iostream>
#include <string>
#include <iomanip>
#include <random>
using namespace std;

int main();
void gowhere();
void deposit();
void witdraw();
void check();

double moneytotal = 0, addmoney, withdrawMoney;
int menu1, upass, hmu = 1, userspot = 0;

    int a = 0, b = 0; //counters

    string username, password, newuser, newpass;

    string usernames[100] = {"Jason"};

    string passwords[100] = {"password"};

int main() {


    cout << "=======Welcome======\n"
         << "1. Login\n"
         << "2. Create user\n"
         << "3. Quit\n\n";

    cin >> menu1;

    switch (menu1) {
        case 1: cout << "=======================\n"
                     << "Please enter Username: ";

                while (a == 0) {
                    cin >> username;

                    for (int x = 0 ; x < hmu ; x++) {
                        if (username == usernames[x]) {
                            upass = x;
                            a += 1;
                            break;
                        }
                        else if (username != usernames[x]) {
                            continue;
                        }
                    }
                }
        case 4: cout << "\nPlease enter password: ";

                while (b == 0) {
                    cin >> password;

                    if (password == passwords[upass]) {
                        cout << "\n" << "Welcome " << username << endl;
                        b += 1;
                    }
                    else {
                        cout << "Not correct please try again: ";
                    }
                }
            break;

        case 2: cout << "\nType your new username: ";
                cin >> newuser;
                hmu += 1;
                userspot += 1;
                usernames[userspot] = newuser;

                cout << "\nEnter your password: ";
                cin >> newpass;
                passwords[userspot] = newpass;
                cout << "\nAll done\n";
            break;

        case 3: cout << "Thank you for using ATM. Have a nice day";
                exit(0);

        case 5: for (int x = 0 ; x < 100 ; x++) {
                    cout << usernames[x] << endl;
                }

    }
    gowhere();

}

void gowhere() {
    int menu2, moneytotal = 0;
    cout << "\n====================\n\n"
         << "What whould you like to do?\n"
         << "1. Deposit\n"
         << "2. Withdraw\n"
         << "3. Check Balance\n"
         << "4. Quit\n\n";

    cin >> menu2;

    switch (menu2) {
        case 1: deposit();
            break;
        case 2: witdraw();
            break;
        case 3: check();
            break;
        case 4: main();

        default: cout << "Not a choice try again";
                 gowhere();
    }
}

void deposit() {
    cout << "\nDeposit how much: ";
    cin >> addmoney;
    moneytotal += addmoney;
    cout << "\nDone\n";
    gowhere();
}

void witdraw() {
    cout << "\nWithdraw how much: ";
    cin >> withdrawMoney;
    moneytotal -= withdrawMoney;
    if (moneytotal < 0) {
        moneytotal += withdrawMoney;
        cout << "\nYou cannot withdraw that much\n";
        gowhere();
    }
    else {
        cout << "\nDone\n";
        gowhere();
    }
}

void check() {
    string goback;
    cout << "\n====================\n"
         << "Your total: " << moneytotal << "\n"
         << "====================\n"
         << "Type \'OK\' to go back: ";
    cin >> goback;
    if (goback == "OK") {
        gowhere();
    }
    else {
        gowhere();
    }
}