深度优先的方式系统地搜索问题的解的算法，递归深度和深度控制-Depth-first way to systematically search the solution algorithms, recursion depth and the depth of control

载入txt文件迷宫,含几种搜索方法,例如depth first search, breadth first search等-TXT file loaded maze, including several search methods, such as the depth first search and breadth first search, etc