Elysian Shadows

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//classes.h (only the code that applies to my problem)
class ImageManager //loads and manages images
{
    private:

    SDL_Surface* playerShip, *miniShip, *medShip, *bigShip; //player and enemy
    SDL_Surface* background;
    SDL_Surface* miniBullet, *medBullet, *bigBullet;

    public:

    ImageManager();
    ~ImageManager();
    SDL_Surface * get_image(imageType type);

};


//classes.cpp (part of code that applies to my error)
ImageManager::ImageManager()
{
    //ships
    playerShip = load_image("playerShip.png");
    miniShip = load_image("miniShip.png");
    medShip = load_image("medShip.png");
    bigShip = load_image("bigShip.png");
    //bullets
    miniBullet = load_image("miniBullet.png");
    medBullet = load_image("medBullet.png");
    bigBullet = load_image("bigBullet.png");
    //other
    background = load_image("background.png");
}

SDL_Surface* ImageManager::get_image(imageType type)
{
    switch(type)
    {
        case EplayerShip:
        return playerShip;
        break;

        case EminiShip:
        return miniShip;
        break;

        case EmedShip:
        return medShip;
        break;

        case EbigShip:
        return bigShip;
        break;

        case Ebackground:
        return background;
        break;

        case EminiBullet:
        return miniBullet;
        break;

        case EmedBullet:
        return medBullet;
        break;

        case EbigBullet:
        return bigBullet;
        break;

        default: break;
    }
    return NULL;
}

ImageManager::~ImageManager()
{
    //ships
    SDL_FreeSurface(playerShip);
    SDL_FreeSurface(miniShip);
    SDL_FreeSurface(medShip);
    SDL_FreeSurface(bigShip);
    //bullets
    SDL_FreeSurface(miniBullet);
    SDL_FreeSurface(medBullet);
    SDL_FreeSurface(bigBullet);
    //other
    SDL_FreeSurface(background);
}




//main.cpp
int SDL_main(int argc, char *argv[])
{
    set_up();

    ImageManager imageMan;
    SDL_Surface * background = imageMan.get_image(Ebackground);

    bool quit = false;

    while(quit==false)
    {
        //background's area
        SDL_Rect backgroundClips;
        backgroundClips.x = 0;
        backgroundClips.y = 0;
        backgroundClips.w = 640;
        backgroundClips.h = 480;

        //banner
        SDL_Rect banner;
        banner.x = 0;
        banner.y = 0;
        banner.w = 640;
        banner.h = 30;

        apply_surface(0,30,background,screen,&backgroundClips);
        SDL_FillRect(screen,&banner,SDL_MapRGB(screen->format,40,60,180));
        SDL_Flip(screen);
        while(SDL_PollEvent(&event))
        {
            if(event.type == SDL_QUIT)
            {
                quit = true;
            }
        }
    }

    clean_up();
    return 0;
}