#include <iostream>
using namespace std;

void database ()
{
    struct datalist
    {
        string username;
        string password;
    };
    datalist registered_users;
}

int main ()
{
    string user;
    string pass;
    string opt;
    cout << "Please login (/login <username> <password>) or register (/reg): " << endl;
    cin >> opt;
    switch (opt)
    {
        case /login:
        cout << "Username: "; << endl;
        cin << user;
        cout << "Password: "; << endl;
        cin << pass;
        if ( user == registered_users.username && pass == registered_users.password )
        {
            cout << "Successfully logged in!" << endl;
        }
        else
        cout << "Incorrect login!" << endl;

        case /reg:
        cout << "Username: " << endl;
        cin << user;
        cout << "Password: " << endl;
        cin << pass;
        registered_users.username = user;
        registered_users.password = pass;
        cout << "Sucessfully registered!" << endl;
    }
    return (0);
}