Create file and read text with QFile and QTextStream

[auba]

but if we don't have that file we need to create it first. How can we do that?

Doc of QFile:pen says:

Note: In WriteOnly or ReadWrite mode, if the relevant file does not already exist, this function will try to create a new file before opening it.

On the other hand, seems like I just need to add "\n" in the middle of the string associated to QString in order to have different rows, is that true? does it work differently in Windows OS?

It works this way: when you only put \n at the end of a line, Notepad on Win32 will not display the text correctly. If you put \r\n at the end, vi will display ^M at the end of each line.
If only QT-Apps use the file, you can use endl and ignore all other editors, else you'll have to replace \r\n or \n to what you want before loading/saving.