SDL 1.2-> SDL 2.0（崩溃程序）

Question

So I used the SDL 2.0 migration guide, and finally made the code compile without errors... but now it crashes, this is the first time I had a program crash, and there is no compiler to guide me. I am using LazyFoo's 29th sdl tutorial, to see if I can migrate it. I honestly think I made an abomination of a program, and I'm tossing it to you guys because I'm clueless. Here is my progress: http://www.pastebucket.com/21174

Answer 1

You appear to have a couple of issues.

First of all you are not loading any of the images in the load_images() function so whenever you call anything on them ie rendering they will be NULL pointers.

Next is your init() function.

bool init()
{
  SDL_Init;  // <---- REMOVE THIS LINE

  //Initialize all SDL subsystems
  if( SDL_Init( SDL_INIT_EVERYTHING) == -1 )
  {
    return false;
  }


  SDL_Window *sdlWindow;        // <----- REMOVE THIS VARIABLE
  SDL_Window *window;           
  SDL_Texture *sdlRenderer;     // <----- REMOVE THIS VARIABLE

  // Create an application window with the following settings:

  // NO NEED FOR SDL_WINDOW_OPENGL replace with SDL_WINDOW_SHOWN

  window = SDL_CreateWindow(
                          "Why is this even alive?",         //    window title
                          SDL_WINDOWPOS_UNDEFINED,           //    initial x position
                          SDL_WINDOWPOS_UNDEFINED,           //    initial y position
                          640,                               //    width, in pixels
                          480,                               //    height, in pixels
                          SDL_WINDOW_SHOWN                   //    flags - see below
                          );

  // sdlWindow should be just window and you should do a NULL check before creating the render
  if (window != NULL) {
    SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0);

    if (renderer == NULL) {
      printf("Could not create renderer: %s\n", SDL_GetError());
      SDL_DestroyWindow(window);
    }
  }
  else {
    printf("Could not create window: %s\n", SDL_GetError());
    return false;
  }
}

Give that a try for now and see how you get on. I recommend you look to use an IDE to help you out as these were all very simple errors that would be picked up straight away normally.