Re: [igraph] Problems reading the number of vertices of a pajek-file using C-Igraph in a 64-bits machine

[Gábor Csárdi]

Hi Charles,

you'll need to send some more information, because foreign.c runs just fine for me. (It is part of the test suite, which is run on 64 bit Ubuntu as well, so not a big surprise.)

So please send _exactly_ the program you are running, the commands you used to compile it, how you run it, and also the output of 'ldd foreign', if your executable is called 'foreign'.

Maybe you are linking to an old version of igraph, this is the only guess I have.

G.

On Sun, Dec 9, 2012 at 10:35 PM, Charles Novaes de Santana <address@hidden> wrote:

Dear all,

I am starting to use Igraph for C and I am impressed with the
functions you have provided to this library. It really makes our life
easier. I was running it at my personal computer (a 32 bits computer
with Ubuntu installed) and everything works fine.

Now I am working with a machine at my university that is more
powerful, but I couldn't run correctly a simple program to read the
number of vertices of a network from in simple pajek file. The program
compiles correctly, it reads the edges of the network correctly, but
it reads the number of vertices like a strange number, like -10585152.
 This number also changes from one running to another, always in
"strange" numbers like that.

I am running the program "foreign.c" that is in the Igraph manual
(http://igraph.sourceforge.net/doc/html/ch19s05.html#igraph_read_graph_pajek).
And I am using the pajek-file I am sending in attach (a simple toy
network).

The machine I am using is a 64-bits computer with Ubuntu, I am using
Gcc 4.6.3 and I have installed Igraph 0.6. As I don't have super-user
permission in this machine, I had to compile the Igraph library at my
home, but I am pretty sure I am linking with the igraph shared library
correctly because I got no errors or warnings during the compilation
of my program foreign.c.

I would appreciate if you could help me with this. May it be a problem
with the compilation of the igraph? Or some incompatibility with the
64-bits?

Thanks in advance for any help!

Best regards,

Charles
--
Um axé! :)

--
Charles Novaes de Santana
http://www.imedea.uib-csic.es/~charles
PhD student - Global Change
Laboratorio Internacional de Cambio Global
Department of Global Change Research
Instituto Mediterráneo de Estudios Avanzados(CSIC/UIB)
Calle Miquel Marques 21, 07190
Esporles - Islas Baleares - España

Office phone - +34 971 610 896
Cell phone - +34 660 207 940

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Gabor Csardi <address@hidden>     MTA KFKI RMKI