编程之美第一题，参考某同事的算法和文章

            Process p = Process.GetCurrentProcess();

            const double SPLIT = 0.01;
            const int COUNT = 200;
            const double PI = 3.14159265;
            const int INTERVAL = 100;

            double[] busySpan = new double[COUNT];  //array of busy times
            double[] idleSpan = new double[COUNT];  //array of idle times
            int half = INTERVAL / 2;

            double radian = 0.0;
            for (int i = 0; i < COUNT; i++)
            {
                busySpan[i] = (double)(half + (Math.Sin(PI * radian) * half));
                idleSpan[i] = INTERVAL - busySpan[i];
                radian += SPLIT;
            }

            double startTime = 0;
            int j = 0;

            while (true)
            {
                j = j % COUNT;

                startTime = Environment.TickCount;

                p.ProcessorAffinity = (IntPtr)0x0001;
                while ((Environment.TickCount - startTime) <= busySpan[j]) ;

                p.ProcessorAffinity = (IntPtr)0x0002;
                while ((Environment.TickCount - startTime) <= idleSpan[j]) ;

                j++;
            }