#include <conio.h>
#include <iostream>
#include <windows.h>
using namespace std;

#define KEY_UP 72
#define KEY_DOWN 80
#define KEY_LEFT 75
#define KEY_RIGHT 77
#define KEY_RETURN 13

void admin_login()
{
    system("cls");
    std::string username, password;
    /*gotoxy(console::width/2-10,console::height/2-3);*/
    std::cout << "nUsername: ";
    std::cin >> username;
    std::cout << "nPassword: ";
    std::cin >> password;
}

int main()
{
    int c = 0;
    int line = 0;
    std::string menu_line[] = { "Admin login", "Guest login", "Change color theme", "Exit" };

    while(1)
    {
        system("cls");

        for(int i = 0 ; i < 4 ; i++)
        {
            if(i == line)
                SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),12);
            else
                SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),15);

            std::cout << menu_line[i] << 'n';
        }


        switch((c=getch()))
        {
            case KEY_UP:
                 --line;
                 if(line == -1)
                     line = 3;
                 break;
            case KEY_DOWN:
                 ++line;
                 if(line == 4)
                     line = 0;
                 break;
            case KEY_RETURN:
                 switch(line)
                 {
                     case 0:
                     system("cls");
                     admin_login();
                     break;
                 }
                 break;
             default:
                 cout << endl << "null" << endl;  // not arrow
                 system("pause");
                 break;
        }
}

return 0;
}