利用回溯法实现n皇后问题，代码简洁易懂，运行速度快，且有注释-Backtracking method is used to realize the n queen problem, understandable code, run fast, and there are comments

本程序由八皇后问题出发，为解决N皇后问题。本程序是跨平台设计,由宏UNIX选择是UNIX还是WIN 。-The procedure starting the eight queens problem, to solve N-Queens problem. The program is cross-platform design, the choice is UNIX or UNIX macro WIN.