// 线程0执行以下代码：
time_t curtime = time(NULL);
struct tm* cdt = localtime(&curtime);
char strtime[25] = "";
sprintf(strtime, "%02d:%02d:%02d", cdt->tm_hour, cdt->tm_min, cdt->sec);
printf("thread [0] time is %s\n", strtime);

// 线程1执行以下代码：
time_t curtime = time(NULL);
struct tm* cdt = gmtime(&curtime);
char strtime[25] = "";
sprintf(strtime, "%02d:%02d:%02d", cdt->tm_hour, cdt->tm_min, cdt->sec);