从打印结果来看，pid1与pid2之间没有时间间隔，相反，pid2与pid1之间却间隔5秒，请大神解释一下！
#include <stdio.h>
#include <sys/time.h>
void main()
{
    while(1)
    {
        struct timeval newtime;
        gettimeofday(&newtime, NULL);
        fprintf(stderr, "pid1=%d  sTime=%5ld\n", getpid(),newtime.tv_sec);
        sleep(5);
        fprintf(stderr, "pid2=%d  sTime=%5ld\n", getpid(),newtime.tv_sec);
  }
}

这点忽视了，感谢提醒