让CPU占用率曲线听你指挥

//C++ code to make task manager generate sine graph
#include "windows.h"
#include "stdlib.h"
#include "math.h"

//把一条正弦曲线0~2π之间的弧度等分成200份进行抽样,计算每个抽样点的振幅
//然后每隔300ms的时间取下一个抽样点,并让CPU工作对应振幅的时间

const int SAMPLING_COUNT = 200;          //抽样点数量
const double PI = 3.1415926535;                //pi值
const int TOTAL_AMPLITUDE = 300;          //每个抽样点对应的时间片

int _tmain(int argc, _TCHAR* argv[])
{
    DWORD busySpan[SAMPLING_COUNT];
    int amplitude = TOTAL_AMPLITUDE / 2;
    double radian = 0.0;
    double radianIncrement = 2.0 / (double)SAMPLING_COUNT; //抽样弧度的增量
    for (int i = 0; i < SAMPLING_COUNT; i++)
    {
        busySpan[i] = (DWORD)(amplitude + (sin(PI * radian) * amplitude));
        radian += radianIncrement;
        // printf("%d\t%d\n", busySpan[i], TOTAL_AMPLITUDE - busySpan[i]);
    }

    DWORD startTime = 0;
    for (int j = 0;;j = (j + 1) % SAMPLING_COUNT)
    {
        startTime = GetTickCount();
        while ((GetTickCount() - startTime) <= busySpan[j])
                ;
        Sleep(TOTAL_AMPLITUDE - busySpan[j]);
    }

    return 0;
}