24点游戏的后台开发，用户输入四个数字，然后通过处理，输出24-24 points of the game development background, the user input four Numbers, and then through the processing, output 24

本代码可以实现n皇后的处理，输出总共的方案个数和具体的皇后布局-This code can achieve n-queens of processing, the output total number of programs and specific layout of the Queen