#include <stdlib.h>
#include "SDL.h"

int main(int argc, char *argv[])  {
  int width = 640;
  int height = 480;

  if (SDL_Init(SDL_INIT_VIDEO) != 0)  {
    return 1;
  }
  atexit(SDL_Quit);

  SDL_Window* window = SDL_CreateWindow(
    "Example", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
    width, height, SDL_WINDOW_RESIZABLE
  );
  Uint32 windowID = SDL_GetWindowID(window);

  while (1)  {
    SDL_Event event;
    while (SDL_PollEvent(&event))  {
      switch (event.type)  {

        case SDL_WINDOWEVENT:  {
          if (event.window.windowID == windowID)  {
            switch (event.window.event)  {

              case SDL_WINDOWEVENT_SIZE_CHANGED:  {
                width = event.window.data1;
                height = event.window.data2;
                break;
              }

              case SDL_WINDOWEVENT_CLOSE:  {
                event.type = SDL_QUIT;
                SDL_PushEvent(&event);
                break;
              }

            }
          }
          break;
        }

        case SDL_QUIT:  {
          return 0;
        }

        /* ... */

      }
    }

    /* ... */

    SDL_Delay(1);
  }
}