VC编写实现随机生产1000个数，求平均数和方差，写在磁盘文件里，并读出来-1000 VC prepared to achieve the number of stochastic production, find the mean and variance, written in the disk file and read out

双摄像头同时开始视频的采集，并可以对计算机中安装的摄像头设备做枚举。本程序是基于DirectShow开发的CameraDS.h CameraDS.cpp 文件集成。在vc环境下实验成功。-Dual camera and began video collection, and can be installed on the computer the camera equipment to do enumeration. This proc