Introduction - If you have any usage issues, please Google them yourself
A similar tank game demo program using the Direction class to carry out the direction of controlling the use of Dot class to calculate the distance to spend Direction class and Dot classes later, the demo program becomes extremely simple and the amount. . Also there' s really nothing, primarily through example, so that everyone familiar with the Direction class class class and Dot do not understand, you can use behind the thread to ask questions, expert If you see something is wrong place, please correct me out, thank Zhijiao