login

#include <iostream>
#include <map>
using namespace std;
std::map<std::string, std::string> usermap;

void addUser(std::string username, std::string password) {
    map[username] = password;
}
boolean registered(std::string username) {
    if (usermap.find(username) != usermap.end()) {
        return true;
    }
    return false;
}
string getPassword(std::string username) {
    if (registered(username)) {
        return usermap[username];
    }
    return NULL;
}
boolean passwordIsCorrect(std::string username, std::string password) {
    if (registered(username)) {
        if (usermap[username] == password) {
            return true;
        }
        return false;
    }
    return false;
}


int main(int argc, char **argv) {

    String huser;
    String hpass;
    int hop;
    std::cout << "Welcome!\n1. login\n2. register";
    std::cin >> hop;
    if (hop == 1) {
        std::cout << "Enter your username: ";
            std::cin >> huser;
            if(registered(huser)) {
                std::cout << "Enter your password: ";
                std::cin >> hpass;
                if (passwordIsCorrect(huser, hpass)) {
                    std::cout << "Logged in!";
                } else {
                    std::cout << "Invalid password!";
                }
            } else {
                std::cout << "Invalid username!";
            }
        } else if (hop == 2) {
            std::cout << "Enter a username: ";
            std::cin >> huser;
            if (registered(huser)) {
                std::cout << "Already registered!";
            } else {
                std::cout << "Enter a password: ";
                std::cin >> hpass;
                addUser(huser, hpass);
                std::cout << "registered!";
            }
        }
    }