I am a beginner in Qt, one part of my project is moving a existing file to another existing directory? Can someone gives me a specific example? I am not sure whether I should use Qfile::rename(). I try write like this

```
QDir::rename("/home/joshua/test.txt","/home/joshua/test/test_c.txt"); 

```

but the error is cannot call member function 'bool QDir::rename(const QString&, const QString&)' without object
 QDir::rename("/home/joshua/test.txt","/home/joshua/test/test\_c.txt");
 ^

Sorry guys, all are my wrong, I asked a so unclear and so stupid question, I am so sorry for wasting your time, I am a beginner, before I asked this question, I really really had not noticed that this question have been asked before, because my level is to low. Because I am too naive, I can not ask question anymore, so please, please forgive me asked this question, I am too stress because I internship at a company, my project for me is quite hard so that I have no choice to do such a wasting your time thing, lastly, I want to say thank you for those who had seen my questions before.