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Exercise 1

Using MPI try to print out:

 Hello world, I am proc X of total Y

with a total number of tasks Y = 4 and X ranging from 0 to 3. After having compiled the code, try to launch it as a batch job (on FERMI: remember to cross-compile!).

`HINTS:`
	C
MPI_INIT	`int MPI_Init(int argc, char **argv)`
MPI_COMM_SIZE	`int MPI_Comm_size(MPI_Comm comm, int *size)`
MPI_COMM_RANK	`int MPI_Comm_rank(MPI_Comm comm, int *rank)`
MPI_FINALIZE	`int MPI_Finalize(void)`
	FORTRAN
MPI_INIT	`MPI_INIT(IERROR) INTEGER IERROR`
MPI_COMM_SIZE	`MPI_COMM_SIZE(COMM, SIZE, IERROR) INTEGER COMM, SIZE, IERROR`
MPI_COMM_RANK	`MPI_COMM_RANK(COMM, RANK, IERROR) INTEGER COMM, RANK, IERROR`
MPI_FINALIZE	`MPI_FINALIZE(IERROR) INTEGER IERROR`
	Execution
batch job	`$ module help cpmd`