--- /dev/null
+## Copyright (C) 2009 Riccardo Corradini <riccardocorradini@yahoo.it>
+## under the terms of the GNU General Public License.
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; If not, see <http://www.gnu.org/licenses/>.
+
+
+# if you have 4 cores or a network of 4 computers with a ssh connection with no password and same openmpi 1.3.3 installation
+# type at the terminal mpirun -np 4 octave --eval hellostruct
+
+
+ MPI_Init();
+ # the string NEWORLD is just a label could be whatever you want
+ CW = MPI_Comm_Load("NEWORLD");
+
+
+
+ my_rank = MPI_Comm_rank(CW);
+ p = MPI_Comm_size(CW);
+ # TAG is very important to identify the message
+ TAG = 1;
+
+
+ message="";
+ if (my_rank != 0)
+ message = struct('f1', {1 3; 2 4}, 'f2', 25);
+ # Could be a vector containing the list of ranks identifiers;
+ rankvect = 0;
+ [info] = MPI_Send(message,rankvect,TAG,CW);
+ else
+ for source = 1:p-1
+ disp("We are at rank 0 that is master etc..");
+ [message, info] = MPI_Recv(source,TAG,CW);
+ message
+ endfor
+ end
+ MPI_Finalize();
+