Why the game window closes after specific time?

Why the game window closes after specific time?

Why the window that created by SDL Library are automatically closed after
specific time.
I know the reason is SDL_Delay() function, but if not used that function,
the game will give me runtime error.
How can I create a window that continuously work without appear in
specific period time ?
My code:
SDL_Window *window;
SDL_Renderer *render;
int main(int argc, char* args[]){
if(SDL_Init(SDL_INIT_EVERYTHING) >= 0){
window = SDL_CreateWindow("Simple game", SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN);
if(window != 0){
render = SDL_CreateRenderer(window, -1, 0);
}
}else{
return 1;
}
SDL_SetRenderDrawColor(render, 0, 0, 0, 255);
SDL_RenderClear(render);
SDL_RenderPresent(render);
SDL_Delay(3000);
SDL_Quit();
return 0
}