code

// ConsoleApplication6.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <Windows.h>
#include <string>
#include "UserPass.h"

std::string username()
{
    std::string user;
    std::cout << "Username: ";
    std::cin >> user;
    if (user.length() < 13) { return user; }

}

std::string password()
{
    std::string pass;
    std::cout << "Password: ";
    std::cin >> pass;
    if (pass.length() < 17) { return pass; }

}
void login()
{
    std::cout << "Logging in...\n";
    Sleep(3000);
    std::cout << "Successfully logged in!\n";
    system("pause");
}

std::string input()
{

    std::string in;
    std::cin >> in;
    return in;

}

int main();

void inputs()
{
    std::cout << "Type \"cmds\" to begin!\n";
    if (input() == "cmds")
    {
        std::cout << "1 = Change Username\n";
        std::cout << "2 = Change Password\n";
    }
    std::string in = input();
    if (in == "2")
    {
        std::string newPass;
        std::string confirmPass;
        std::string currPass;
        std::cout << "Current Password: ";
        std::cin >> currPass;
        if (currPass == UserNPass::passW)
        {
            std::cout << "\nNew Password: ";
            std::cin >> newPass;
            std::cout << "\nConfirm Password: ";
            std::cin >> confirmPass;
            if (newPass == confirmPass)
            {
                UserNPass::passW = newPass;
                system("cls");
                main();
            }
            else
            {
                std::cout << "New Password and Confirm Password do not match!\n";
            }
        }

    }
    else if (in == "1")
    {
        std::string newUser;
        std::cout << "\nNew Username: ";
        std::cin >> newUser;
        UserNPass::userN = newUser;
        system("cls");
        main();
    }
}

int main()
{
    if (username() == UserNPass::userN && password() == UserNPass::passW)
    {
        std::cout << "Authorizing...\n";
        Sleep(2000);
        login();
        inputs();
    }
    else
    {
        std::cout << "Authorizing...\n";
        Sleep(2000);
        std::cout << "Wrong password/username!";
        Sleep(2000);
        system("cls");
        main();
    }

    return 0;
}


---------- UserNPass HEADER FILE ----------


#pragma once

#include <string>

namespace UserNPass {
std::string userN = "admin";
std::string passW = "admin123";
}