（二）SDL2.0初探-窗口创建&&标题修改

        先给出一个有趣的例子，它会在窗口标题栏上循环打印不同的标题：

#include "SDL.h"

int main(int argc, char* argv[])
{

  SDL_Window *window;
  SDL_Event e;

  const char *titles[] = { // just for fun, let's make the title animate like a marquee and annoy users
    "t", "thi", "this w", "this win", "this windo", "this window's", "this window's ti", "this window's title",
    "chis window's title is", "chih window's title is ", "chih wandnw's title is ", "c  h wandnw'g title is ",
    "c  h  a  nw'g titln is ", "c  h  a  n  g  i  n ig ", "c  h  a  n  g  i  n  g!", "",
    "c  h  a  n  g  i  n  g!", "", "c  h  a  n  g  i  n  g!", "c  h  a  n  g  i  n  g!"
  };

  SDL_Init(SDL_INIT_VIDEO); // Init SDL2

  // Create a window.
  window = SDL_CreateWindow(
    "This will surely be overwritten", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 320, 240, SDL_WINDOW_RESIZABLE
  );

  // Enter the main loop. Press any key or hit the x to exit.
  for( ; e.type!=SDL_QUIT&&e.type!=SDL_KEYDOWN; SDL_PollEvent(&e)){
    static int i = 0, t = 0;

    if(!(++t%9)){ // every 9th frame...
      SDL_SetWindowTitle(window, titles[i]); // loop through the
      if(++i >= sizeof(titles)/sizeof(titles[0])) i = 0; // array of titles
    }

    SDL_Delay(10);

  }

  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;

}

        运行效果图：
               
        以前的代码都是基于1.2版本的，比较旧，而且代码功能上也不及2.0，这个是2.0的一个小框架。算是入门的代码，可以先学习！2.0在1.2基础上做了很多优化，2.0在显示方面尽可能获得硬件加速支持。官网上的文档写得是非常详细: ，随时可以上去查询。