Why does screen have a value of NULL, when it has a value?

[Malaxiz]

Why does screen have a value of NULL in the if statement, when it really has a value?

bool init()
{
    //Initialize all SDL subsystems
    if( SDL_Init( SDL_INIT_EVERYTHING ) == -1 )
    {
        return false;
    }

    //Set up the screen
    screen = SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE );

    // If screen setup did not work
    if(screen == NULL);
    {
        cout << "screen = NULL  |  " << screen << endl;
    }

    // Set the caption on the window
    SDL_WM_SetCaption("Test", NULL);

    return true;
}

[keskiverto]

What does SDL_GetError() say? What is the value of NULL?

[Malaxiz]

You know what, I accidently put a semicolon after the if state. The cout happened automatically.