C: 为什么 CLOCKS_PER_SEC 在我的处理器速度是 3.10GHz 时打印 1000

Question

我的电脑配置是

英特尔酷睿 i3-2100 CPU@3.10GHz

Windows7 64 位

但是当我执行下面的代码时，为什么它打印 1000？

#include<stdio.h>
#include<conio.h>
#include<time.h>
main()
{
    printf("Clock %d",CLOCKS_PER_SEC);
    getch();
}

实际时钟速度应该在每秒 3.1x10^12 左右，对吗？

Answer 1

Clock ticks are units of time of a constant but system-specific length, as those returned by function clock.

与处理器速度无关。

Answer 2

见Why is CLOCKS_PER_SEC not the actual number of clocks per second?

POSIX requires that CLOCKS_PER_SEC equals 1000000 independent of the actual resolution.

C: Why CLOCKS_PER_SEC is printing 1000 when my processor speed is 3.10GHz