int main int argc char argv SDL_Surface screen SDL_Event event SDL_Rec

int main(int argc, char *argv[]){
  SDL_Surface *screen; 
  SDL_Event event;
  SDL_Rect dst;
  if (SDL_Init(SDL_INIT_VIDEO)) 
    return 1; 
  screen = SDL_SetVideoMode(640, 480, 32, 
                            SDL_ANYFORMAT);
  if (!screen){
    SDL_Quit();
    return 1; 
  }
  dst.x = 10;
  dst.y = 10;
  dst.w = 50;
  dst.h = 50;
  SDL_FillRect(screen, &dst, 
               SDL_MapRGB(screen->format,0,255,0));
  SDL_Flip(screen);  
  while(SDL_WaitEvent(&event)){
    if(event.type == SDL_QUIT || 
      (event.type == SDL_KEYDOWN &&
      event.key.keysym.sym == SDLK_ESCAPE))
    {
      SDL_Quit();
      return 0;
    }
  }
  SDL_Quit();
  return 2;
}