说明：  纯C语言写的简单打字游戏，分为简单、中等、难度三个等级，进入后，从天上掉字母，你需要按键盘上的对应键击中字母，让字母消失，同时显示你的正确率和击中数目，确实是很简单的打字游戏，不过用纯C实现起来还真不简单，而且它的画面是彩色的，考察的知识是综合的。
(Written in pure C language simple typing game, divided into easy, medium, three difficulty levels, enter, fall from heaven letter, you need to press the corresponding key on the keyboard hit the letter, so that the letters disappear, and show you the correct rate and hit the number is indeed very simple typing game, but they' re all pure C implementation is not simple, and it is the color screen to study the knowledge is integrated.)