读取声卡数据得动态DLL，是自己编写得，如果有不对的，清指正，见笑了-read card data in dynamic DLL, in the preparation of their own, if wrong, correct money, a laughing stock

计算股市理想状态下的收益率,可以通过改变DAYNUM的值来改变所需球的天数-Calculation of the ideal state of the stock market rate of return, you can DAYNUM by changing the value to change the number of days required for the ball