【求助】一个简单的qt语句是什么意思，英文不好，大家帮我看看啥意思 [复制链接]

如题，就是这句：
int elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
尤其是qobject_Cast<QTimer*>是什么个意思呀？

打开 assistant 或 qtcreator 自己先看看manual

sender() returns a pointer.
qobject_cast<QTimer*>(sender()) converts this pointer to be a QTimer pointer.
It is type casting.

The following code does the same thing:
QTimer * timer = qobject_cast<QTimer*>(sender()) ;
int elapsed = (elapsed + timer->interval()) % 1000;

It is not an English problem. This is C++ basic.

引用楼主67284727于2010-04-23 10:21发表的 【求助】一个简单的qt语句是什么意思，英文不好，大家帮我看看啥意思 :
如题，就是这句：
int elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
尤其是qobject_Cast<QTimer*>是什么个意思呀？

引用第2楼steinlee于2010-04-23 10:55发表的  :
sender() returns a pointer.
qobject_cast<QTimer*>(sender()) converts this pointer to be a QTimer pointer.
It is type casting.
The following code does the same thing:
.......

哦，我原来是学的C，只看了一周C++，感觉c++比c方便多了，呵呵，就是不好学，

read something about type casting. C++ is the most difficult programming language ever developed.
if you know c++ well, it will be easier for you to handle any other one.