说明：  国外游戏开发者杂志1999年第一期配套代码，包含Jeff Lander关于2维碰撞检测的代码和Bruce Dawson的关于结构异常处理的文章
(-Code of game development magazine in 1999 first issue, it including code of Jeff Lander`s about two-dimensional collision check and Bruce Dawson`s article about structure exception handling )