编程之美1.1多核CPU

方波  sin波  直线 // ==================【控制cpu曲线】=================// @ author         :       zhyh2010// @ date           :       20150609// @ version        :       1.0// @ description    :       核心： 在任务管理器的一个刷新周期内//                      CPU 忙的时间 和 刷新时间的比率就是 CPU 的占用率//                      CPU 显示的实际只是一个平均值// ================【end of 控制cpu曲线】===============#include <stdlib.h>#include <stdio.h>#include <windows.h>#include <math.h>// void busy1()// {//  for (int i = 0; i != 10; i++)//  {//      system("start calc");//  }//  system("taskkill /f /im calc.exe");//  printf("busy\n");// }void DrawSin(){    system("title sin");    const float PI = 3.1415926535;    const int count = 360;    const int GAP = 1;    const DWORD totalTime = 200;    float x = 0;    float ratio[count] = { 0 };    for (int i = 0; i != count; i++, x += GAP)        ratio[i] = 0.5 * sin(PI * x / 180.0);    for (int i = 0; TRUE; i = (i + 1) % count)    {        DWORD startTime = GetTickCount();        while (GetTickCount() - startTime < (0.5 + ratio[i]) * totalTime);        Sleep((0.5 - ratio[i]) * totalTime);    }}void DrawLinear(float ratio = 0.9){    system("title drawline");    const DWORD totalTime = 200;        while (true)    {        DWORD startTime = GetTickCount();        while (GetTickCount() - startTime < ratio * totalTime);        Sleep((1 - ratio) * totalTime);    }   }void DrawSquareWave(float max = 0.9, float min = 0.1){    system("title squareWave");    const DWORD totalTime = 200;    const int count = 300;    for (int i = 0; TRUE; i = (i + 1) % count)    {        float ratio = (i > count / 2) ? max : min;        DWORD startTime = GetTickCount();        while (GetTickCount() - startTime < ratio * totalTime);        Sleep((1 - ratio) * totalTime);    }}void main(){    // ===============【设置进程所在cpu】=================    SetProcessAffinityMask(GetCurrentProcess(), 1);    DrawLinear();    //DrawSin();    //DrawSquareWave();}