SDL2到底怎么用啊OTZ

想加载一张图片，到底哪里错了，真心求问
，c4黑屏就没了……
#include "SDL2/SDL.h"
#include "SDL/SDL.h"
int main(int argc, char *argv[])
{
SDL_Init(SDL_INIT_EVERYTHING);
SDL_Window *win = SDL_CreateWindow(NULL, 0, 0, 640, 480,
SDL_WINDOW_SHOWN);
SDL_Renderer *ren = SDL_CreateRenderer(win, -1,
SDL_RENDERER_ACCELERATED |
SDL_RENDERER_PRESENTVSYNC);
SDL_Surface *bmp = SDL_LoadBMP("hello.bmp");
SDL_Texture *tex = SDL_CreateTextureFromSurface(ren, bmp);
SDL_FreeSurface(bmp);
SDL_RenderClear(ren);
SDL_RenderCopy(ren, tex, NULL, NULL);
SDL_RenderPresent(ren);
SDL_Delay(3000);
SDL_DestroyTexture(tex);
SDL_DestroyRenderer(ren);
SDL_DestroyWindow(win);
SDL_Quit();
return 0;
}