用C語言編程：要求使CPU使用率為50%；且成壹條直線？

#include<Winbase.h>

#include<stdlib.h>

int main()

{

int busyTime=10;

int idleTime=busyTime;

__int64 startTime=0;

while(true)

{

startTime=GetTickCount();

//busy loop

while(GetTickCount()-startTime<=busyTime);

//idle loop

Sleep(idleTime);

}

return 0;

}