https://github.com/NeighborhoodWang/algorithm_NQueens_HorseStep/blob/master/N_queens_puzzle.cpp
https://github.com/NeighborhoodWang/algorithm_NQueens_HorseStep/blob/master/horse_step.cpp
设棋盘用笛卡尔坐标系表示,如果只有八个皇后。
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原文地址:http://blog.csdn.net/neighborhoodguo/article/details/48035909