Is there a difference between the two types of coding(for Header File)??

[rezas1000]

Hello

Is using the code below

#include <QtWidgets>

#include <QtWidgets>

To copy to clipboard, switch view to plain text mode 

There are certain differences with the following code????:

#include <QWidget>
#include <QLabel>
#include <QTextEdit>
#include <QMenu>
.......
.......

#include <QWidget>
#include <QLabel>
#include <QTextEdit>
#include <QMenu>
.......
.......

To copy to clipboard, switch view to plain text mode 

thanks.

[anda_skoa]

The first one is a module include, it indirectly includes all headers of the respective module, in this case QtWidgets.
The second option is including each type individually.

I wouldn't recommend using the frist one outside of small test programs or prototyping.
Including all headers means that the compiler will have to parse a lot of declarations that it then doesn't need, i.e. a waste of build time.


Cheers,
_