编程之美-让cpu曲线显示正弦

#include<iostream>

#include<windows.h>

#include<math.h>

using namespace std;

int main()

{

 const float PI = 3.1416;

 int count = 180; //一个周期有多少个点

 int number = 200;

 int idle[180];

 int busy[180];

 float alpha = 0;

 float delta = 2*PI/count; //每次移动距离

 for(int i = 0; i < count; ++i)

 {

 busy[i] = number*(sin(alpha)+1)/2; //busy[i]+[idle[i] = number. 而busy[i]又是弦函数

 idle[i] = number-busy[i];

 alpha = alpha+delta;

 }

 int j = 0;

 int st_time;

 while(1)

 {

 j = j%number;

 st_time = GetTickCount(); //记录时间

 while((GetTickCount()-st_time) < busy[j]) ;

 Sleep((idle[j]));

 j++;

 }

 return 0;

}