说明：  15数码问题的3种算法(算法和具体代码) 解决15数码问题的3种算法，分别是深度，宽度，以及A*算法。c语言编写，VC下都通过运行。
(15 digital issues three kinds of algorithm (algorithm and the specific code) to solve the problem of 15 digital three kinds of algorithms, respectively, are the depth, width, and the A* algorithm. c languages, VC by running under.)