time.h clock()在OS X上坏了吗? [英] time.h clock() broken on OS X?

问题描述

我会生气吗?我正在x86_64上运行它.

Am I going mad? I'm running this on x86_64.

#include <stdio.h>
#include <time.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
    printf("Clock: %f\n", clock() / (double)CLOCKS_PER_SEC);
    sleep(1);
    printf("Clock: %f\n", clock() / (double)CLOCKS_PER_SEC);
    sleep(1);
    printf("Clock: %f\n", clock() / (double)CLOCKS_PER_SEC);
    return 0;
}

此打印

时钟:0.002880
时钟:0.002968
时钟:0.003019

Clock: 0.002880
Clock: 0.002968
Clock: 0.003019

它显然在sleep(1)行上等待一秒钟，但是输出显然是错误的.

It clearly waits for a second at the sleep(1) lines, but the output is clearly wrong.

如果这不起作用，是否有便携式C替代品?

If that doesn't work, is there a portable C alternative?

推荐答案

我是个白痴. clock()返回已使用的处理器时间.

I'm an idiot. clock() returns processor time used.

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