[DeAldeEiam]

Hello,

i have a small Problem to create my blockMeshDict. I use a m4 script where I calculate all elements for my blocks with one source block. But now I get a point number and an error message.

Is there a possibility to round numbers in my m4 script? e.g. 71.25 => 71

thanks a lot

[Antimony]

Hi,

Can you not make use of the "floor" function?

Cheers,
Antimony

[bjnieuwboer]

I encoutered the same problem when I tried to compute the mesh size. I looked a bit into perl and found that the printf statement can be used to print integers.

In most m4 blockmesh files the calc function is defined. I defined a second calc function:

define(calc_round, [esyscmd(perl -e "printf ('%d', $1)")])

Instead of computing a floating point value

define(Nx,calc(L/dx))

you can now use:

define(Nx,calc_round(L/dx))

to compute the integer value.

I found this solution here. It might be a good reference if you want to do some other formatting.