#include #include int main() { printf("hello, world!\n"); SDL_Init(SDL_INIT_VIDEO); SDL_Surface *screen = SDL_SetVideoMode(256, 256, 32, SDL_SWSURFACE); if (SDL_MUSTLOCK(screen)) SDL_LockSurface(screen); for (int i = 0; i < 256; i++) { for (int j = 0; j < 256; j++) { *((char*)screen->pixels + i*256*4 + j*4 + 0) = i; *((char*)screen->pixels + i*256*4 + j*4 + 1) = j; *((char*)screen->pixels + i*256*4 + j*4 + 2) = 255-i; *((char*)screen->pixels + i*256*4 + j*4 + 3) = 255; } } if (SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen); SDL_Flip(screen); printf("you should see a colored cube."); SDL_Quit(); return 0; }