这是一个用控制台做的螺旋线的动画，帮你改变背景，实现简单动画

C++开发的算平均值，残差，标准偏差，和总不确定度 -C development numerical average, residuals, standard deviation, and the total uncertainty

接收单元，我们采用的原理和调频收音机原理一样。图3为接收电路，以专用调频接收模块IC1 TDA7021T为核心，经解调后的音频信号从脚输出，送到IC2 LM386作功率放大，推动耳机发声。三极管BG9018等组成高频放大级，以提高接收灵敏度。调节可调电容器C23可以改变接收频率，使其对准发射机的发射频率。-Receiving unit, we have adopted the principle and the principle of like FM radio. Figure 3 for the receiver circuit to a dedicated IC1 TDA7021T FM receiver module as the core, after demodulation of the audio signal after the output from the feet, to make IC2 LM386 power amplifier, and promote sound headphones. BG9018 triode composed of high-frequency amplification level in order to improve receiver sensitivity. Conditioning adjustable capacitor C23 can change the receiver frequency so that it fired at the transmitter frequency.

在不同的使用环境下使用的编码可能不一样，以及在通信过程中采用不同方式编码，该源码主要是UTF8和GBK编码互相转换，具体实现请看代码中的注释

LinProg.NET is a framework for mathematical programming implemented on .NET platform. This framework is supporting linear, integer, boolean and quadratic programming. Framework is written on Microsoft .NET version 2.0.

VC6中不同类型之间的转换，困扰很多VC程序员的难题-VC6 between different types of conversion, troubled many of the problems programmers VC

VC++开发的DOS界面写字板-development of the VC DOS interface tablet

Windows 窗口线段选择的程序-the Windows segment selection proce

串口编程调试精灵源代码-serial programming source code debugging Stars

希望大家共同交流！-hope that we can exchange!

精通QT4编程-代码（共四部分），此为第2部分-Proficient QT4 programming- the code (a total of four parts), This is Part 2