gettimeofday得到的是什么

Cocos2d-x
#1

废话不多说先上代码
void HelloWorld::update(float dt){
Size visibleSize = Director::getInstance()->getVisibleSize();
struct timeval now;
__String* newTime = __String::createWithFormat("%d", now.tv_sec);
auto timettf = Label::createWithTTF(newTime->getCString(), “fonts/hanyi.ttf”, 80);
timettf->setColor(Color3B(255, 0, 0));
timettf->setPosition(visibleSize.width/2, visibleSize.height/2);
this->addChild(timettf, 20, TIMETTF);
}
运行后显示的是18670，我计算了一下大概是5个小时，然而现在时间是13:20，这串数字代表什么东西，怎么改成北京时间呢？

#2

http://www.cnblogs.com/wwcherish/p/4015706.html

http://baike.baidu.com/link?url=KERi42SxCI9blOeWJA_gUY3tpYc1YV60xFz4eITHvTu2I4IxUUXd11YExx-OqToTJK4e8uC159K4TT8nCAeaGq

#3

谢谢大神 :2: