การใส่ลายน้ำให้รูปพร้อมๆกันเยอะๆ

 private void button1_Click(object sender, EventArgs e)
        {
            ProcessDirectory("D:\\JAVA_งานน้องตี้\\HTMLPad\\img");
        }


        public   void ProcessDirectory(string targetDirectory)
        {
            // Process the list of files found in the directory. 
            string[] fileEntries = Directory.GetFiles(targetDirectory);
            foreach (string fileName in fileEntries)
                ProcessFile(fileName);

            // Recurse into subdirectories of this directory. 
            string[] subdirectoryEntries = Directory.GetDirectories(targetDirectory);
            foreach (string subdirectory in subdirectoryEntries)
                ProcessDirectory(subdirectory);
        }

public static void ProcessFile(string path)
        {
            Console.WriteLine("Processed file '{0}'.", path);
            Bitmap bmp = (Bitmap)(Bitmap.FromFile(path));
            Graphics gg = Graphics.FromImage(bmp);

            gg.TranslateTransform(20, 20);
            gg.RotateTransform((float)( 180.0 / Math.PI * Math.Atan2(bmp.Height , bmp.Width )  ));

            SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(128, 0, 0, 255));
            gg.CompositingQuality = CompositingQuality.GammaCorrected;
            gg.DrawString("expert-programming-tutor.com Tel. 0853507540", new Font("Ariel", 25, FontStyle.Regular), semiTransBrush, 0, 0);


            gg.Flush();

            String path2 = path.Replace("D:\\JAVA_งานน้องตี้\\HTMLPad\\img\\", "D:\\JAVA_งานน้องตี้\\HTMLPad\\img2\\") ;
             if (!  Directory .Exists ( Path.GetDirectoryName (path2 ) ))
             {
                 Directory.CreateDirectory(Path.GetDirectoryName(path2));
             }
            bmp.Save(path2, System.Drawing.Imaging.ImageFormat.Jpeg);
        }

การดึงข้อมูลหุ้น จาก www.set.co.th แบบ อัตโนมันติ โดยใช้ C#

เขียนโปรแกรมจับตา โดยใช้ OPENCV

http://hackaday.com/2012/05/30/opencv-k ... -tracking/

การใช้ high Resolution Timer ด้วย c++

#include <windows.h>
#include <stdio.h>
#include <conio.h>

typedef struct {
	LARGE_INTEGER start;
	LARGE_INTEGER stop;
} stopWatch;

class CStopWatch {

private:
	stopWatch timer;
	LARGE_INTEGER frequency;
	double LIToSecs( LARGE_INTEGER & L) ;
public:
	CStopWatch() ;
	void startTimer( ) ;
	void stopTimer( ) ;
	double getElapsedTime() ;
};
double CStopWatch::LIToSecs( LARGE_INTEGER & L) {
	return ((double)L.QuadPart /(double)frequency.QuadPart) ;
}

CStopWatch::CStopWatch(){
	timer.start.QuadPart=0;
	timer.stop.QuadPart=0; 
	QueryPerformanceFrequency( &frequency ) ;
}

void CStopWatch::startTimer( ) {
	QueryPerformanceCounter(&timer.start) ;
}

void CStopWatch::stopTimer( ) {
	QueryPerformanceCounter(&timer.stop) ;
}

double CStopWatch::getElapsedTime() {
	LARGE_INTEGER time;
	time.QuadPart = timer.stop.QuadPart - timer.start.QuadPart;
	return LIToSecs( time) ;
}

#define n 200000

int main(int argc, char*argv[])
{
	int x[n];
	int j= 0;
	int k = 1;
	int l = 0;
	int m=0;
	CStopWatch timer;
	for(int k=1;k<n/2;k=k*2)
	{
		timer.startTimer();
		for(int l=0;l<20;l++)
		{
			
			for(int i=0;i< k;i++)
			{
				m=i;
				while(m<n)
				{
					//printf("%d ",m);
					x[m] = 7*x[m]*x[m];
					m = (m + k  )   ; 
				}
			}
		}
		timer.stopTimer();
		printf("\nk= %d -->  \t%lf\n\n",k,timer.getElapsedTime());
	}
	


}

เฉลย Google Code jam 2009 : Welcome to google code jam (Dynamic Programming)

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.Scanner;

public class WelcomToGoogleCodeJam {
	public static void main(String[] args) {
		try {
			String welcom = "welcome to code jam";
			PrintWriter pw = new PrintWriter(new File("out-large.out"));
			Scanner sc = new Scanner(new File("C-large-practice.in"));

			int T = Integer.parseInt(sc.nextLine());
			for (int i = 1; i <= T; i++) {
				String s = sc.nextLine();
				BigInteger mem[] = new BigInteger[welcom.length()];
				for(int j=0;j< welcom.length();j++)
				{
					mem[j] = new BigInteger("0");
				}
				for (int j = 0; j < s.length(); j++) {
					char x = s.charAt(j);
					if (welcom.contains("" + x)) {
						if (x == welcom.charAt(0)) {
							mem[0] = mem[0] .add(BigInteger.ONE);
						} else {
							for (int k = 1; k < welcom.length(); k++) {
								if (x == welcom.charAt(k))
									mem[k] = mem[k].add( mem[k - 1]);
							}
						}
					}
				}
				String output ;
				output = String.format("%04d", mem[ welcom.length()-1].mod(new BigInteger( "10000")));
				System.out.println("Case #"+i+": "+output);
				pw.println("Case #"+i+": "+output);
			}
			pw.close();
		} catch (IOException ee) {
			ee.printStackTrace();
		}

	}
}

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