自学教程：C++ stime函数代码示例

static void settime(cell hour,cell minute,cell second){  #if defined __WIN32__ || defined _WIN32 || defined WIN32    SYSTEMTIME systim;    GetLocalTime(&systim);    if (hour!=CELLMIN)      systim.wHour=(WORD)wrap((int)hour,0,23);    if (minute!=CELLMIN)      systim.wMinute=(WORD)wrap((int)minute,0,59);    if (second!=CELLMIN)      systim.wSecond=(WORD)wrap((int)second,0,59);    SetLocalTime(&systim);  #else    /* Linux/Unix (and some DOS compilers) have stime(); on Linux/Unix, you     * must have "root" permission to call stime()     */    time_t sec1970;    struct tm gtm;    time(&sec1970);    gtm=*localtime(&sec1970);    if (hour!=CELLMIN)      gtm.tm_hour=wrap((int)hour,0,23);    if (minute!=CELLMIN)      gtm.tm_min=wrap((int)minute,0,59);    if (second!=CELLMIN)      gtm.tm_sec=wrap((int)second,0,59);    sec1970=mktime(&gtm);    stime(&sec1970);  #endif}

/******************************************************************************  * version:    1.0  * author:     link  * date:       2015.11.10  * brief:      设置系统时间******************************************************************************/int LINUX_RTC::set_rtc(rtc_time rtc_tm){    int 				ret;    int  				rtc_fd;    time_t 				t1;    rtc_tm.tm_year -= 1900;                     //年从1900开始    rtc_tm.tm_mon -= 1;                         //月从0开始    rtc_fd = open("/dev/rtc0", O_RDWR, 0);      //打开RTC    if (rtc_fd == -1){        printf("/dev/rtc0 open error/n");        return -1;    }    t1 = timelocal((tm*)&rtc_tm);             //设置系统时间    stime(&t1);    ret = ioctl(rtc_fd, RTC_SET_TIME, &rtc_tm); //设置RTC时间    if (ret == -1){        printf("rtc ioctl RTC_SET_TIME error/r/n");        return -1;    }    close(rtc_fd);                              //关闭RTC    return 0;}

intsettime (struct timespec const *ts){#if defined CLOCK_REALTIME && HAVE_CLOCK_SETTIME  {    int r = clock_settime (CLOCK_REALTIME, ts);    if (r == 0 || errno == EPERM)      return r;  }#endif#if HAVE_SETTIMEOFDAY  {    struct timeval tv;    tv.tv_sec = ts->tv_sec;    tv.tv_usec = ts->tv_nsec / 1000;    return settimeofday (&tv, 0);  }#elif HAVE_STIME  /* This fails to compile on OSF1 V5.1, due to stime requiring     a `long int*' and tv_sec is `int'.  But that system does provide     settimeofday.  */  return stime (&ts->tv_sec);#else  errno = ENOSYS;  return -1;#endif}

/* settimestamp(seconds1970) sets the date and time from a single parameter: the * number of seconds since 1 January 1970. */static cell AMX_NATIVE_CALL n_settimestamp(AMX *amx, const cell *params){  #if defined __WIN32__ || defined _WIN32 || defined WIN32    int year, month, day, hour, minute, second;    stamp2datetime(params[1],                   &year, &month, &day,                   &hour, &minute, &second);    setdate(year, month, day);    settime(hour, minute, second);  #else    /* Linux/Unix (and some DOS compilers) have stime(); on Linux/Unix, you     * must have "root" permission to call stime(); many POSIX systems will     * have settimeofday() instead     */    #if defined __APPLE__ /* also valid for other POSIX systems */      struct timeval tv;      tv.tv_sec = params[1];      tv.tv_usec = 0;      settimeofday(&tv, 0);    #else      time_t sec1970=(time_t)params[1];      stime(&sec1970);    #endif  #endif  (void)amx;  return 0;}

int Dij(int st,int en){	memset(f,-1,sizeof(f));	memset(tag,0,sizeof(tag));	int i,j,k,ll,p;	f[st]=0;h[st]=0;	for (ll=0;ll<n;ll++){		p=-1;		for (i=1;i<=n;i++)			if (f[i]>-1 && !tag[i])				if (p==-1 || f[i]<f[p]) p=i;		if (p==-1) break;		tag[p]=1;		for (j=0;j<gn[p];j++){			k=g[p][j];			int time=stime(p,k,f[p])+d[p][k];			if (time<0) continue;			if (f[k]==-1 || time<f[k]){				f[k]=time;				h[k]=p;			}		}	}	if (f[en]==-1) return 0;	printf("%d/n",f[en]);	pr(en);	printf("/n");	return 1;}

int main(int argc, char *argv[]){	int descritor;	time_t horaLocal, horaRemota;	/* FIXME A valida
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