//得到系统时间  
CCString* HelloWorld::getSystemTime()  
{  
  
      
    struct tm *tm;  
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)  
    //win32平台  
    time_t timep;  
    time(&timep);  
    tm = localtime(&timep);  
#else  
    //android、ios平台  
      
    struct cc_timeval now;  
    CCTime::gettimeofdayCocos2d(&now,NULL);  
    tm = localtime(&now.tv_sec);  
#endif  
    int year = tm->tm_year + 1900;  
    int month = tm->tm_mon + 1;  
    int day = tm->tm_mday;  
    int hour=tm->tm_hour;  
    int min=tm->tm_min;  
  
      
    CCString *string=CCString::createWithFormat("%d-%d-%d %d:%d",year,month,day,hour,min);  
      
      
    return string;  
  
}