abc

定义一个基类MyGraph，要求有一个纯虚函数double Area()=0。从基类派生一个圆类Circle和矩形类Rectangle，再由Rectangle类派生出Square类，分别给出Area()实现。 重载“>>”，实现对图形信息的输入。在主函数中计算三种形状的面积，并显示输出。 (Define a base class MyGraph, requires a pure virtual function double Area () = 0. Derive a circle and a rectangle class Rectangle Circle class from the base class, and then by Square Rectangle class derived class, are given Area () implementation. Reload " > > " to achieve the input of graphical information. Calculate the shape of the three main functions in the area, and display output.)

win 7 64位 驱动编程教程加源码 大牛制造 值得学习 上传分享(Win 7 64-bit drive programming tutorial plus source of large cattle manufacturing is worth learning to share)

OPC客户端源码，可以访问PLC等，通过测试(OPC client source code, you can visit, such as PLC)

Another Dayz SA hack with script r

说明：  基于MFC单文档，能够在MFC中显示BMP格式图片的程序(Based on MFC single document, a program that can display BMP format pictures in MFC)

谭浩强c语言基础教程学习，里面包括多种格式选择(Hemopurification c language c language versions, select a variety of formats)

音视频捕捉和回放类，并包含调节向导示例，示例中展示如何使用该类，开放人员完全可以将这些类放入自己的工程使用。代码使用direct sound技术封装，包含文件录音，多文件混音播放，本地录音回放，音量调节等多个功能示例。(video&audio wizard demo)

Bacnet steak 0.8 version

windows 套接口 编程 udp(windows udp socket programming)

c++激光雷达，技术开发，注意是c++，不是MATLAB(C++ laser radar, technology development, attention is c++, not MATLAB)