LaTeX-examples/documents/Programmierparadigmen/scripts/mpi/comm-rank-example.c

#include "mpi.h" 

int       rank;
MPI_Comm  comm;

...
MPI_Comm_rank(comm, &rank);
if (rank==0) {
    ... Code fur Prozess 0 ... 
}
else {
    ... Code fur die anderen Prozesse ... 
}