单核CPU正弦曲线

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编程之美的例子

#include "Windows.h"
#include "stdlib.h"
#include "math.h"
#include <iostream>

using namespace std;

const double SPLIT = 1;
const int COUNT = 300;
const double PI = 3.14159265;
const int INTERVAL = 100;

int main(int argc,_TCHAR* argv[])
{
    DWORD busySpan[COUNT];
    DWORD idleSpan[COUNT];
    int half = INTERVAL / 2;
    double radian = 0.0;
    for(int i = 0; i < COUNT;i++)
    {
        busySpan[i] = (DWORD)(half + (sin(PI * radian) * half));
        idleSpan[i] = INTERVAL - busySpan[i];
        radian += SPLIT;
    }

    DWORD startTime = 0;
    int j = 0;
    while(true)
    {
        j = j % COUNT;
        startTime = GetTickCount();
        while((GetTickCount() - startTime) <= busySpan[j])
            ;
        Sleep(idleSpan[j]);
    }
    //cout << "Hello world!" << endl;
    return 0;
}

结果我并没跑出来！噗！