Class call fail

[GoranGaming]

I'm getting so pissed on this right now. I can't call the "Login" class from the "TitleScreen" class.

#include <iostream>
#include <string>
#include <windows.h>
#include <time.h>

using namespace std;

int main();

string username = "Joey";
int password = 4433;

class TitleScreen{
    public:
        void Start(){
            cout << "Welcome to the London Bank ATM.\n" << endl;
            Sleep(2000);
            cout << "Insert your card please.\n" << endl;
            Login LoginObject;
            LoginObject.Username();
        }
    private:
};

class Login{
    public:
        void Username(){
            Sleep(4000);
            cout << "Username: ";
            cin >> username;
            cout << "Password: ";
            cin >> password;
        }
    private:
};

int main()
{
    TitleScreen TitleScreenObject;
    TitleScreenObject.Start();
}

C:\Users\Kodning\Desktop\C++ Projects\Bank ATM 2.0\main.cpp: In member function 'void TitleScreen::Start()':
C:\Users\Kodning\Desktop\C++ Projects\Bank ATM 2.0\main.cpp:20:13: error: 'Login' was not declared in this scope
C:\Users\Kodning\Desktop\C++ Projects\Bank ATM 2.0\main.cpp:20:19: error: expected ';' before 'LoginObject'
C:\Users\Kodning\Desktop\C++ Projects\Bank ATM 2.0\main.cpp:21:13: error: 'LoginObject' was not declared in this scope

[pogrady]

You need to declare the Login object before the titlescreen object. as it stands right now the titlescreen object doesn't know that the Login object exists.