线性方程一元求解double roundto(double x,int n) //将某数保留指定位数！-linear equations to solve one yuan roundto double (double x, int n) / / designated certain reservations median!

一个netbeans开发的小小字谜游戏，具有漂亮大JFC界面，运行前提要装JDK1.5-Netbeans development of a small crossword puzzle games, with pretty big JFC interface, operating premise loaded with JDK1.5