c#的画图有关代码，别人的基础上做的一点改进，希望对学习I画图的同学有帮助...

S3C44B0播放WAV文件。不多说，看代码便知(S3C44B0 play WAV files. Not much to speak and read the code glance that)

说明：  着 是 学生管理系统的代码，希望传上去对别的初学者有一定的帮助。(Is a student management system with the code, I hope Chuan beginners up to the other certainly helpful to them.)

题目：有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？ 1.程序分析：可填在百位、十位、个位的数字都是1、2、3、4。组成所有的排列后再去 　　　　　　掉不满足条件的排列。 (Title: There are numbers 1,2,3,4, how many can be composed of distinct three-digit numbers without repetition? Is how much? 1. Program Analysis: fill in the hundred, ten, a bit of the numbers are 1,2,3,4. Composed of all the permutations and then remove the arrangement does not meet the conditions.)

fuzhudawadwadwadwadaw(fuhzudwadwadadwaddwadawdwa)

果汁机产品电路原理图与源代码程序，适合于学习使用(The circuit principle diagram)

说明：  bc++build 6.0 最简CGI程序演示(bc++build 6.0 cgi example)

用于对无人直升机进行操作杆控制的地面仿真程序，可实现对无人直升机的飞行方向、油门等的控制。(For unmanned helicopters operating lever to control ground simulation program can be realized on the direction of flight of unmanned helicopter, throttle and other controls.)

opencv2.4.3 读入摄像头 检测运动物体显示运动轨迹(opencv2.4.3 read display camera to detect moving objects trajectories)

小波包分析提取振动信号中的特征频率，分析了该信号的时域、频域、倒谱，循环谱等,有井曲线作为输入可计算其地震波的衰减。( Wavelet packet analysis to extract vibration signal characteristic frequency, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. There is a well attenuation curve as input to calculate its seismic waves.)

QR分解  void cvQR(CvMat *inputA,CvMat *q,CvMat *r) {     CvSize inputSize=cvGetSize(inputA); int width=inputSize.width; int height=inputSize.height; cvSetI