#include directives?

Natalie2210 · May 14, 2013, 05:04

Hi!

I'm sorry since this is a basic question, but I'm pretty much confused about finding #include - directives within function bodys in OpenFOAM. What do they do there - I always thought #includes were preprocessor directives?

Thanks a lot,
Natalie

akidess · May 14, 2013, 05:18

They are preprocessor directives indeed. You still retain the freedom to place them anywhere you want.

ngj · May 14, 2013, 05:50

Hi Natalie,

Yes, it is a bit confusing at first.

In OF you have the standard inclusion of header files, which tells the solver/utility/etc, which methods can be used in the program. These are those placed before "main".

Secondly, a considerable amount of source code is used several places throughout different solver, e.g. createMesh.H or createDynamicFvMesh.H. These are not conventional header files, but merely bits of source code, which construct different types of finite volume meshes. These are also included into the solvers/utilities using include statements, and I suppose this approach has been adopted in order to avoid duplicating source code and thereby reducing the risk of bugs.

Kind regards

Niels

Natalie2210 · May 14, 2013, 06:09

ah ok. I have had a look at the header files and they actually contain code which is, it seems, pasted by the preprocessor into the source. Thank you!

Natalie

May 14, 2013, 05:04	#include directives?	#1
Natalie2210 Member Join Date: Feb 2013 Posts: 30 Rep Power: 13	Hi! I'm sorry since this is a basic question, but I'm pretty much confused about finding #include - directives within function bodys in OpenFOAM. What do they do there - I always thought #includes were preprocessor directives? Thanks a lot, Natalie

May 14, 2013, 05:18		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	They are preprocessor directives indeed. You still retain the freedom to place them anywhere you want. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
cyclic boundary conditions for FSI	kanuk	OpenFOAM Programming & Development	10	April 25, 2014 02:52
OpenFoam install script Error during paraFoam installation	SePe	OpenFOAM Installation	10	June 19, 2010 15:15
critical error during installation of openfoam	Fabio88	OpenFOAM Installation	21	June 2, 2010 03:01
Problems in compiling paraview in Suse 10.3 platform	chiven	OpenFOAM Installation	3	December 1, 2009 07:21
OpenFOAM15 paraFoam bug	koen	OpenFOAM Bugs	19	June 30, 2009 10:46

May 14, 2013, 05:50		#3
ngj Senior Member Niels Gjoel Jacobsen Join Date: Mar 2009 Location: Copenhagen, Denmark Posts: 1,900 Rep Power: 37	Hi Natalie, Yes, it is a bit confusing at first. In OF you have the standard inclusion of header files, which tells the solver/utility/etc, which methods can be used in the program. These are those placed before "main". Secondly, a considerable amount of source code is used several places throughout different solver, e.g. createMesh.H or createDynamicFvMesh.H. These are not conventional header files, but merely bits of source code, which construct different types of finite volume meshes. These are also included into the solvers/utilities using include statements, and I suppose this approach has been adopted in order to avoid duplicating source code and thereby reducing the risk of bugs. Kind regards Niels

May 14, 2013, 06:09		#4
Natalie2210 Member Join Date: Feb 2013 Posts: 30 Rep Power: 13	ah ok. I have had a look at the header files and they actually contain code which is, it seems, pasted by the preprocessor into the source. Thank you! Natalie