DOBUTSU

int main(void) {
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS | SDL_INIT_TIMER) > 0) {
        std::cerr << SDL_GetError() << std::endl;
    }

    if (IMG_Init(IMG_INIT_PNG) > 0) {
        std::cerr << IMG_GetError() << std::endl;
    }

    if (TTF_Init() > 0) {
        std::cerr << TTF_GetError() << std::endl;
    }

    TTF_Font* TTF_FontFont = TTF_OpenFont("font.ttf", 25);
    if (TTF_FontFont == nullptr) {
        std::cerr << TTF_GetError() << std::endl;
    }

    ...
    TTF_CloseFont(TTF_FontFont);
    SDL_DestroyRenderer(SDL_RendererRenderer);
    SDL_DestroyWindow(SDL_WindowWindow);
    IMG_Quit();
    TTF_Quit();
    SDL_Quit();
    return 0;
}